FLORIDA CANYON FEASIBILITY STUDY DELIVERS SUBSTANTIAL INCREASE IN MINERAL RESERVE, GOLD PRODUCTION OVER AN 8-YEAR MINE LIFE AND US$0.8 BILLION IN AFTER-TAX FREE CASH FLOW; PROVIDES OPERATIONAL UPDATE

FLORIDA CANYON FEASIBILITY STUDY DELIVERS SUBSTANTIAL INCREASE IN MINERAL RESERVE, GOLD PRODUCTION OVER AN 8-YEAR MINE LIFE AND US$0.8 BILLION IN AFTER-TAX FREE CASH FLOW; PROVIDES OPERATIONAL UPDATE TSXV: ITR; NYSE American: ITRG

www.integraresources.com

VANCOUVER, BC, June 25, 2026 /PRNewswire/ - Integra Resources Corp. ("Integra" or the "Company") (TSXV: ITR) (NYSE American: ITRG) is pleased to announce the results of its updated Technical Report Feasibility Study and Life-of-Mine Plan (the "Technical Report") for the producing Florida Canyon Mine ("Florida Canyon" or the "Project"), located in Nevada. Less than two years after acquiring Florida Canyon for $68 million ("M ") 1, Integra has transformed the operation into a larger, longer-life asset with a 74% increase in Proven and Probable Mineral Reserves, a 17% increase in annual gold production and active mining extended through 2033. Florida Canyon is now expected to generate over $0.8 billion ("B") from gold production in after-tax free cash flow 2 and total payable gold production of 685 thousand ounces ("Koz") over life-of-mine ("LOM"), including 2 years of gold production from residual leaching starting in 2033.

(All amounts in United States ("U.S.") dollars and Metric Units unless otherwise stated)

2026 Florida Canyon Technical Report Highlights:

George Salamis, President, CEO and Director of Integra commented: "Since acquiring Florida Canyon in late 2024, the team has developed a deep understanding of the operation and systematically addressed the opportunities identified during the acquisition. Through disciplined investment, exploration drilling, operational improvements and detailed mine planning, Florida Canyon has been transformed into a fundamentally stronger asset with higher gold production, lower future costs, a longer mine life and a substantially larger mineral reserve base. Florida Canyon is now expected to generate approximately $0.8 billion in after-tax free cash flow over an 8-year mine life, establishing Florida Canyon as the cash flow engine of Integra and providing the financial foundation to advance our development pipeline in Idaho and Nevada."

Mr. Salamis added: "Based on the updated mine plan, we are intentionally investing to drive future growth. The higher costs expected in 2026 are short-term in nature and are tied to increased mining rates at the mine this year. As Florida Canyon transitions to a more stable operation, we expect to benefit from lower costs and enhanced economics."

"The updated Mineral Resource Estimate demonstrates the significant value created at Florida Canyon since its acquisition. Despite two years of mining depletion, the Company has increased Proven and Probable Mineral Reserves by 74%, extended mine life by 3-years and increased annual gold production by 17%. Importantly, this growth has been achieved within a producing, self-funding mine and reinforces the Company's belief that Florida Canyon remains significantly underexplored with substantial upside. Combined with the advancement of DeLamar and Nevada North, Florida Canyon provides a strong foundation for Integra's long-term growth as a U.S.-focused precious metals producer."

Integra will host a conference call and webcast to discuss the Technical Report on June 26, 2026, at 8am Pacific Time / 11am Eastern Time, featuring a presentation from the senior management team and a live Q&A session. A recording will be available on Integra's corporate website at www.integraresources.com. To register for the webcast, please use the following link (call details are listed below):

https://events.q4inc.com/attendee/752689074

Technical Report Summary

The Technical Report reflects the evolution of Florida Canyon from a project with limited mine life and flat annual gold production into a project with an increased production profile and an extended mine life. The enhanced mine plan utilizes existing infrastructure and the current crushing circuit to support an 8-year operating mine life with a LOM site-level AISC of $2,331/oz. Annual gold production increases 17% from 70 Koz to 82 Koz, resulting in LOM gold sold of 685 Koz.

The mine plan outlined in the Technical Report represents a material transformation of Florida Canyon. To realize this growth, Integra plans to use its existing cash flow to invest approximately $92 M towards growth capital investments, including $55 M towards the expansion of heap leach capacity within the existing Mine Plan of Operations footprint and $37 M towards the modernization and replacement of the legacy fleet. These investments allow the Company to execute on the updated mine plan outlined in the Technical Report. The Technical Report highlights a base case after-tax NPV of $601 M (see Table 1 for base case gold price assumptions and Table 2 for after-tax NPV and LOM cumulative cash flows at various gold prices).

The Company retained Global Resource Engineering ("GRE") as lead consultants, along with other engineering consultants, to complete the Technical Report and prepare the Technical Report in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101"). The Technical Report is derived from the updated mineral reserve estimate effective May 31, 2026. The effective date of the Technical Report is June 25, 2026, and the Technical Report prepared in accordance with NI 43-101 will be filed on the Corporation's website and under its SEDAR+ profile within 45 days of this news release.

Table 1: Florida Canyon Technical Report Highlights 1

Mining

Total Tonnage Mined (K tonnes ("Kt"))

211,199

Total Ore Mined (Kt)

116,935

Strip Ratio (Waste: Ore)

0.81

Mine Life (Mining Yrs)

8.0

Contained Gold (Koz Au)

1,156

Production

LOM Average Gold Recovery (%)

56.7 %

LOM Gold Recoverable Placed (Koz Au)

656

LOM Gold Sold (Koz Au)

685

Average Annual Gold Sold (Koz Au) - Mining Yrs

81.8

Costs per Tonne (Mining Years 2026 to 2033)

Mining Costs ($/t mined)

$3.04

Mining Costs ($/t placed)

$5.50

Crushing & Processing Costs ($/t placed)

$3.03

G&A Costs ($/t placed)

$1.24

Total Site Operating Cost ($/t placed)

$9.77

LOM Site-Level Cash Costs ($/oz Au)

LOM Cash Cost, net-of-silver by-product

$1,940

LOM Site-Level AISC, net-of-silver by-product 2

$2,331

LOM Capital Expenditure ($ M)

Sustaining Capital

$130.2

Capitalized Stripping

$86.5

Development Drilling

$7.9

Financing Leases - Sustaining

$42.8

Growth Capital

$91.8

Financing Leases - Growth Capital

$8.6

Salvage Value

($16.9)

Reclamation Cost

$40.2

Bonding Cash Collateral Return

($11.4)

Gold Price Assumptions ($/oz)

Gold Price 2026

$4,344

Gold Price 2027

$4,414

Gold Price 2028

$4,169

Gold Price 2029

$3,824

Gold Price 2030 to 2035

$3,600

Project Economics ($ M)

After-Tax NPV5%

$600.6

Average Annual Net Free Cash Flow (Mining Yrs)

$90.0

Total Net Free Cash Flow

$769.5

(1)

Please refer to "Cautionary Note Regarding Non-GAAP Measures" for a description of non-GAAP financial measures included in this table.

(2)

Excluding closure costs.

Figure 1: Florida Canyon Annual Production and Operating Cost Profile 1

(1)

Please refer to "Cautionary Note Regarding Non-GAAP Measures" for a description of non-GAAP financial measures included in this figure.

Figure 2: Florida Canyon LOM After-tax Free Cash Flow 1

(1)

Please refer to "Cautionary Note Regarding Non-GAAP Measures" for a description of non-GAAP financial measures included in this figure.

Table 2: Florida Canyon After-Tax NPV and LOM After-tax Net Cash Flow ("CF") Sensitivity to Gold Price 1

Gold Price Estimate ($/oz)

Change in

Gold Price

After-Tax

NPV (5%) $M

After-Tax

LOM CF $M

2026

2027

2028

2029

2030 to

2035

(25 %)

$203.8

$275.3

$3,535

$3,311

$3,127

$2,868

$2,700

(20 %)

$283.5

$374.8

$3,697

$3,531

$3,335

$3,059

$2,880

(15 %)

$363.2

$474.1

$3,859

$3,752

$3,544

$3,250

$3,060

(10 %)

$443.1

$573.5

$4,021

$3,973

$3,752

$3,442

$3,240

(5 %)

$522.3

$672.1

$4,183

$4,193

$3,961

$3,633

$3,420

Base

$600.6

$769.5

$4,344

$4,414

$4,169

$3,824

$3,600

5 %

$676.5

$864.2

$4,506

$4,635

$4,377

$4,015

$3,780

10 %

$752.3

$958.7

$4,668

$4,855

$4,586

$4,206

$3,960

15 %

$828.0

$1,053.2

$4,830

$5,076

$4,794

$4,398

$4,140

20 %

$903.6

$1,147.3

$4,992

$5,297

$5,003

$4,589

$4,320

25 %

$978.0

$1,239.4

$5,154

$5,518

$5,211

$4,780

$4,500

(1)

Please refer to "Cautionary Note Regarding Non-GAAP Measures" for a description of non-GAAP financial measures included in this table.

Property Description, Location and Access

Florida Canyon is located 125 miles (~201 kilometers) east of Reno, Nevada, and immediately south of Interstate 80. The nearest towns are Winnemucca, 40 miles northeast (~64 kilometers) with a population of 8,388 (2022) and Lovelock, 33 miles southwest, with a population of 1,854 (2022). The highway exit for the Florida Canyon Mine from I-80 is at Imlay, Nevada. Access is reliable via the Interstate year-round.

Commercial mining operations at Florida Canyon began in 1986 using conventional open-pit mining and heap-leach processing methods. The mine operated continuously through 2011 before entering a period of intermittent production until 2015. Florida Canyon was subsequently restarted in mid-2016 following new investment and operational improvements and has remained in operation since. Since the restart, Florida Canyon has undergone modernization and expansion efforts, including upgrades to equipment, heap-leach infrastructure, permitting expansions, and long-term mine planning initiatives.

Figure 3: Florida Canyon Location Map

Updated Mineral Resource Estimate

Mineral resources were re-estimated from the resource model released in 2024 and include historic waste rock stockpiles whose grade exceeds current cut-off grades for the Project. The updated Mineral Resource Estimate ("MRE") incorporates a revised geological interpretation that includes structural domains and shear controls. These changes improved grade continuity within mineralized zones and reduced dilution associated with previous estimation domains. The revised geological model includes infill, confirmatory and exploration drilling completed since 2024, together with historical drilling completed by previous operators. In total, the MRE is based on 5,454 drill holes totaling 665,423 meters ("m"). The updated MRE for Florida Canyon was modeled following industry-standard and Canadian Institute of Mining, Metallurgy & Petroleum ("CIM") compliant protocols.

Key steps included:

The MRE is constrained within an optimized pit shell generated using updated metal prices, metallurgical recoveries, operating costs and slope assumptions consistent with reasonable prospects for eventual economic extraction.

Table 3: Florida Canyon and Standard Mine MRE

Mineral Resources

Measured

Indicated

Measured & Indicated

Inferred

GOLD (Au)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Florida Canyon Mine

Oxide

171,842

0.31

1,706

171,842

0.31

1,706

53,312

0.25

433

Sulphide

104,004

0.86

2,876

Standard Mine

Oxide

8,532

0.49

135

Sulphide

1.47

TOTAL

Mixed

171,842

0.31

1,706

171,842

0.31

1,706

165,879

0.65

3,446

Mineral Resources

Measured

Indicated

Measured & Indicated

Inferred

SILVER (Ag)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Florida Canyon Mine

Oxide

Sulphide

Standard Mine

Oxide

Sulphide

TOTAL

Mixed

Notes for Florida Canyon Mineral Resource Estimate

Notes for Standard Mine Mineral Resource Estimate

Mineral Reserve Estimate

The Mineral Reserves were estimated by applying detailed mine design, production schedules, operating costs, metallurgical recoveries and economic criteria to the Measured and Indicated Mineral Resources. The engineered open pits were constrained with cut-off grades that reflect updated metal prices, metallurgical recoveries and known operating costs. Based on updated geotechnical assessment and operating experience, inter-ramp slope angles in selected areas were increased from 38 degrees to 42 degrees, resulting in additional economic pit inventory available for resource conversion. Along with confirmatory and exploration drilling, refined engineering and the inclusion of historic waste rock stockpiles, the updated mineral reserve estimate fully replaces mining depletion since the acquisition of Florida Canyon and supports an extension of active mining through 2033.

Table 4: Florida Canyon Mineral Reserve

Mineral Reserves

Proven

Probable

Proven & Probable

GOLD (Au)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Florida Canyon Mine

Oxide

118,471

0.31

1,191

118,471

0.31

1,191

TOTAL

Oxide

118,471

0.31

1,191

118,471

0.31

1,191

Mineral Reserves

Proven

Probable

Proven & Probable

SILVER (Ag)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Tonnes

(kt)

Grade

(g/t)

Ounces

(koz)

Florida Canyon Mine

Oxide

TOTAL

Mixed

Notes to Mineral Reserves

Production Profile

The Technical Report outlines 8-years of active mining and ore placement, followed by approximately two years of residual gold recovery from heap leaching, extending the operating mine life from 2030 in the 2024 Technical Report to 2033 in the updated Technical Report. The 8-years of active mining at Florida Canyon are followed by 2-years of residual leaching. The updated mine plan shows an increase in annual production from 70 Koz Au in the 2024 Technical Report to 82 Koz in the updated Technical Report, which represents an annual increase of 12 Koz per year.

The Company anticipated 2026 would be a cost intensive transition year as it addressed a deferred stripping campaign in the Central pit and undertook fleet replacement and upgrades. The Technical Report reflects these investments and outlines a more stable and sustainable operating plan, reducing production variability and supporting a more consistent and predictable production profile over an increased LOM.

Mining

Mining is currently conducted as a conventional open-pit operation using truck-and-loader methods. The mine plan schedules 22.0 to 28.1 million tonnes ("Mt") of total material movement per year ("/yr"), which is consistent with historical mining performance and fleet capability, with an average of 14.6 Mt/yr of ore transferred to the heap leach pad. Approximately, 7.1 Mt/yr of ore is scheduled for crushing to 2.5 inches, consistent with capacity and historical operating performance of the existing crushing circuit. Crushed material will be blended with approximately 4.5 Mt to 9.3 Mt/yr of run-of-mine ("ROM") material during the 10-year LOM (8-years of active mining). The mine plan schedules 211.2 Mt of total material movement over the 8-year active mine life, including 116.9 Mt of ore with an average grade of 0.31 g/t Au, resulting in 656 Koz Au recoverable placed on the heap leach pad over LOM. The LOM average strip ratio of 0.81 waste tonnes per ore tonne is consistent with historical operating performance and supports the economic extraction of the reserve inventory.

The increased mine life and enhanced production profile are primarily driven by the expansion of the Central Pit and Radio Tower Pit. Mining is planned in the Central Pit from 2026 through 2028, followed by the Radio Tower Pit from 2028 through 2030. Mining from 2030 through 2033 will occur at the Jasperoid Pit and through the processing of historic waste rock stockpiles.

Mining assumptions were developed using recent operating performance, equipment productivity analyses, labour requirements, maintenance planning and detailed production scheduling. The Technical Report provides a mine plan that can be executed effectively and deliver consistent production. Through an improved geological model and detailed forward planning, the Company expects to improve operation reliability and preserve flexibility that supports multiple ore sources to unlock additional value from the Mineral Reserve base.

Figure 4: Florida Canyon Mining Profile

Processing and Recovery

Crushed ore at Florida Canyon passes through two stages of open circuit crushing to a final crush size of 80% minus 2.5 inches with processing capabilities of 21,000 tonnes per day ("tpd"). Crushed ore is then agglomerated with a polymer binding agent to improve solution percolation through the heap leach pad and is delivered via haul truck. The ore can also be delivered to the heap leach pad through a series of overland conveyors and mobile grasshopper conveyors, or a combination of both.

Crushed ore, representing 47% of all material transferred to the heap leach pad, is blended with ROM ore at the heap lead pad dump face. Barren solution (cyanide-bearing solution very low in gold grade) is applied selectively to different areas of the heap leach pad through drip irrigation tubing at an average application rate of 0.003 gallons per minute per square foot.

Heap leach pad expansions at Florida Canyon are planned within the existing Mine Plan of Operations at the Project. The heap leach pad expansion will take place over four total phases, with two phases completed between 2026 and 2028 and two phases completed in 2030 and 2031.

Figure 5: Florida Canyon Project Ounces Recoverable Placed Crushed vs. ROM

Table 5: Florida Canyon Project Mining & Processing Summary

ROM

Crushing

Total

Mining

Total Ore Mined (Kt)

61,648

55,287

116,935

Total Waste (Kt)

94,264

Total Mined (Kt)

211,199

Strip Ratio (Waste: Ore)

0.81

Grade & Contained Metals

Average Gold Grade (g/t Au)

0.21

0.42

0.31

Contained Gold (Koz Au)

410

746

1,156

Production

LOM Average Gold Recovery (%)

44.8 %

63.3 %

56.7 %

LOM Gold Recoverable Placed (Koz Au)

184

473

656

Ounces on the Heap Leach Pad as of Dec 31, 2025 (Koz Au)

LOM Gold Sold (Koz Au)

685

Operating Costs

The Technical Report provides a comprehensive assessment of Florida Canyon with a mine plan that reflects current and future operating realities. The Technical Report includes nearly two years of detailed review and analysis by Integra of operating costs, maintenance requirements, labour assumptions and long-term mine planning. The Company completed a bottom-up evaluation of all major cost categories at the Project, incorporating historical operating performance, budget variances and previously underrepresented costs to develop a more comprehensive and realistic cost structure. Assumptions have been updated to reflect current market conditions, including labour costs consistent with Nevada's competitive mining sector and expected turnover and vacancy rates.

The Technical Report also incorporates a fully integrated mine plan to support the expanded reserve base, including permitting costs and engineered plans for future heap leach pads. Equipment assumptions have been updated to reflect a more proactive maintenance strategy, integrating both planned component replacement programs and expected unplanned downtime based on historical operating performance. The Technical Report also includes investments in fleet modernization, including the transition to larger haul trucks and other equipment upgrades designed to improve productivity, increase reliability and reduce unit mining costs over time. Together, these investments support a more stable and predictable operating profile while providing the infrastructure and equipment capacity required to execute the mine plan.

Table 6: Florida Canyon Operating Cost Breakdown

Mining Years (2026 to 2033)

$ Per Tonne

Operating Costs 2026 to 2033

Mined

Placed

Mining

$3.04

$5.50

Crushing and Conveying / Processing

$3.03

G&A

$1.24

Total Site Costs

$9.77

Figure 6: Florida Canyon Annual Operating Cost ("Opex") per Tonne Placed

Table 7: Florida Canyon LOM Cash Costs and Site-Level AISC 1

Life Of Mine

$/oz Au

Site-Level Cash Costs, AISC Breakdown

By-Product

Mining

$939

Crushing and Conveying / Processing

$547

G&A

$231

Total Site Costs

$1,717

Transport & Refining

Royalties

$246

Total Cash Costs

$1,972

Silver By-Product Credits

($32)

Total Cash Costs Net of Silver by-Product

$1,940

Sustaining Capital

$391

Site-Level All-in Sustaining Costs - Excluding Closure Costs

$2,331

Closure Costs Net of Residual Value

$42

Site-Level All-in Sustaining Costs – Including Closure Costs

$2,373

(1) Please refer to "Cautionary Note Regarding Non-GAAP Measures" for a description of non-GAAP financial measures included in this table.

Capital Cost Estimates

The expanded production profile outlined in the Technical Report is expected to be funded from Florida Canyon's existing and future cash flow. The updated mine plan at Florida Canyon will be realized through growth capital investments of $92 M that will result in a materially enhanced Project. Expanding heap leach pad capacity is a key component of the updated mine plan, supporting both the longer mine life and increased production profile at Florida Canyon. The Company has allocated $55 M to construct two heap leach pad expansions within the existing Mine Plan of Operations footprint. In addition, the Company will invest approximately $37 M in fleet modernization, replacing aging loaders and legacy 777 haul trucks approaching their operating life with larger, more productive 785 haul trucks. These upgrades are expected to increase material movement capacity, improve operating efficiency and support the expanded production profile and longer mine life outlined in the Technical Report.

Sustaining capital of approximately $267 M includes ~$87 M for the completion of the extensive pre-stripping campaign in the Central Pit, which commenced in 2025 and is expected to conclude in 2026, providing access to higher-grade ore and supporting future production. In addition, ~$53 M in ongoing parts replacement and preventative maintenance designed to improve reliability and reduce unplanned downtime and ~$32 M for two additional heap leach pads are included in sustaining capital.

Table 8: Florida Canyon Capital Cost Breakdown

Yr 2026 to

Yr 2035

Yr 2036 to

Yr 2038

Combined

LOM

Sustaining Capital Costs

Sustaining Capital

$130.2

$0.0

$130.2

Capitalized Stripping

$86.5

$0.0

$86.5

Development Drilling

$7.9

$0.0

$7.9

Lease Payments (Financing) - Sustaining

$42.8

$0.0

$42.8

Total Sustaining Capital & Stripping

$267.4

$0.0

$267.4

Other Capital

Lease Payments (Financing) - Growth

$8.6

$0.0

$8.6

Growth Capital

$91.8

$0.0

$91.8

Residual Value 1

($16.9)

$0.0

($16.9)

Reclamation 2

$19.9

$20.3

$40.2

Cash collateral return 3

$0.0

($11.4)

Total Other Capital

$103.4

$8.9

$112.3

TOTAL SUSTAINING CAPITAL & OTHER

$370.8

$8.9

$379.7

(1)

The residual value represents estimated salvage value of mobile mining equipment and process / crushing / conveying equipment.

(2)

Reclamation costs include ~$6M for reclamation of Standard Mine.

(3)

Current cash collateral is assumed released in final year, once the reclamation is completed.

Next Steps and Opportunities

The Technical Report includes multiple opportunities for further additional Project optimization. These opportunities are conceptual in nature and not included in current Mineral Reserve Estimate or economic analysis.

Guidance Update

The Company is revising its 2026 site-level AISC guidance at Florida Canyon. The adjustment to AISC is primarily attributed to an increase in the tonnes, mined, stacked and processed to support production, lower gold ounces sold during Q1 2026, increased royalties 1 and excise taxes resulting from stronger-than-anticipated gold prices, and higher diesel fuel and explosive costs. The Company now expects 2026 site-level AISC guidance to increase from $2,750 to $2,950 to $3,300 to $3,500 but confirms 2026 production guidance of 70 Koz to 75 Koz. The updated mine plan and costs presented in the Technical Report are grounded in historical and actual operation analysis and establish a realistic, executable mine plan moving forward that is expected to deliver more consistent production, lower long-term costs and sustainable value creation.

(1)

Cost guidance calculated using average Au price of $4,200.

Florida Canyon Technical Report Conference Call & Webcast

Integra will host a conference call and webcast on Friday, June 26, 2026, at 11:00 AM Eastern Time / 8:00 AM Pacific Time, to discuss the Florida Canyon Technical Report. Details for the conference call and webcast are included below.

Dial-In Numbers / Webcast:

Conference ID: 5650865

Toll-Free: (800) 715-9871

Toll: +1 (646) 307-1963

Webcast: https://events.q4inc.com/attendee/752689074

About Integra

Integra is a growing precious metals producer in the Great Basin of the Western United States. Integra is focused on demonstrating profitability and operational excellence at its principal operating asset, the Florida Canyon Mine, located in Nevada. In addition, Integra is committed to advancing its flagship development-stage heap leach projects: the past producing DeLamar Project located in southwestern Idaho and the Nevada North Project located in western Nevada. Integra creates sustainable value for shareholders, stakeholders, and local communities through successful mining operations, efficient project development, disciplined capital allocation, and strategic M&A, while upholding the highest industry standards for environmental, social, and governance practices.

ON BEHALF OF THE BOARD OF DIRECTORS

George Salamis

President, CEO and Director

CONTACT INFORMATION

Corporate Inquiries: [email protected]

Company website: www.integraresources.com

Office phone: 1 (604) 416-0576

Qualified Persons

The scientific and technical information contained in this news release has been reviewed and approved by James Frost, P.Eng., Director, Technical Services of Integra Resources Corp., who is a Qualified Person as defined by NI 43-101.

The Company retained Global Resource Engineering as lead consultants, along with other engineering consultants, to complete the Technical Report. The following independent Qualified Persons with associated firms have reviewed and approved this news release as defined by NI 43-101:

Antoine Teixeira de Carvalho, P.Geo. - BT Africa Mining Services

Dave Swanton, MSc, P. Geo, - Equity Exploration Consultants Ltd.

Hamad Samari, Ph.D, MMSA QP – Global Resource Engineering, Ltd.

Larry Breckenridge, P.E. - Global Resource Engineering, Ltd.

Maxime Lamothe, P.E. - Alius Mine Consulting

Terre Lane, MMSA QP - Global Resource Engineering, Ltd.

Todd Harvey, Ph.D., SME Register Member – Global Resource Engineering, Ltd.

Data Verification

The Qualified Persons responsible for the Technical Report have verified the data for which they are accountable, including the sampling, analytical, and test data underlying the information disclosed in this news release. Geological, mine engineering and metallurgical reviews included, among other things, reviewing drill data and core logs, review of geotechnical and hydrological studies, environmental and community factors, the development of the life-of-mine plan, capital and operating costs, transportation, taxation and royalties, and review of existing metallurgical test work. In the opinion of the Qualified Persons, the data, assumptions, and parameters used in the sections of the Technical Report that they are responsible for preparing are sufficiently reliable for those purposes. The Technical Report, when filed, will contain more detailed information concerning individual Qualified Persons responsibilities, associated quality assurance and quality control, and other data verification matters, and the key assumptions, parameters and methods used by the Company.

Sampling and QA/QC Procedure

Thorough QA/QC protocols are followed on the Project, including insertion of duplicate, blank and standard samples in the assay stream for all drill holes. The samples are submitted directly to American Assay Labs in Reno, Nevada for preparation and analysis. Analysis of gold is performed using fire assay method with atomic absorption ("AA") finish on a 1 assay ton aliquot. Gold results over 5 g/t are re-run using a gravimetric finish. Silver analysis is performed using ICP for results up to 100 g/t on a 5-acid digestion, with a fire assay, gravimetric finish for results over 100 g/t silver.

Additional supporting details regarding the information in this news release, will be provided in the Technical Report which will be available on SEDAR+ under the Company's profile within 45 days of this news release, including all qualifications, assumptions and exclusions that relate to the Technical Report. The Technical Report is intended to be read as a whole, and sections should not be read or relied upon out of context.

Forward Looking Statements

Certain information set forth in this news release contains "forward‐looking statements" and "forward‐looking information" within the meaning of applicable Canadian securities legislation and in applicable United States securities law (referred to herein as forward‐looking statements). Forward-looking statements are often identified by the use of words such as "may", "will", "could", "would", "anticipate", "believe", "expect", "intend", "potential", "estimate", "budget", "scheduled", "plans", "planned", "forecasts", "goals" and similar expressions. Except for statements of historical fact, certain information contained herein constitutes forward‐looking statements which includes, but is not limited to, statements with respect to: the future financial or operating performance of the Company, the Project and its mineral properties; the Company's updated 2026 guidance; the estimation of mineral resources and reserves; the realization of mineral resource and reserve estimates; the development, operational and economic results of the Technical Report for the Project, including cash flows, revenue potential, development, expenditures, and timing thereof, extraction rates, life-of-mine projections and cost estimates; timing of completion of the Technical Report and the filing thereof; magnitude or quality of mineral deposits; anticipated advancement of the Project mine plan, including, without limitation, the expansion of heap leach pad capacity and continued modernization of the Company's mining fleet; exploration expenditures, costs and timing of the development of new deposits; costs and timing of future exploration; permitting; construction and optimization planning, including, without limitation, timing of the Final Environmental Impact Statement and Record of Decision; estimates of metallurgical recovery rates; anticipated advancement and further exploration of the Project and surrounding areas, future prospects and prospective inclusion of Mineral Resources in future mining activities; requirements for additional capital; the future price of metals; government regulation of mining operations; environmental risks; the timing and possible outcome of pending regulatory matters; the realization of the expected economics of the Project; future growth potential of the Project; future development plans; and the date and timing of the conference call and webcast to discuss the Technical Report. Forward-looking statements are based on a number of factors and assumptions made by management and considered reasonable at the time such statement was made. Assumptions and factors include: the Company's ability to complete its planned exploration and development programs; the absence of adverse conditions at the Project and the Company's mineral properties; satisfying ongoing covenants under the Company's loan facilities; no unforeseen operational delays; no material delays in obtaining necessary permits; results of independent engineer technical reviews; the possibility of cost overruns and unanticipated costs and expenses; the price of gold remaining at levels that continue to render the Project and the Company's mineral properties economic; the Company's ability to continue raising necessary capital to finance operations; and the ability to realize on the mineral resource and reserve estimates. Forward‐looking statements necessarily involve known and unknown risks and uncertainties, which may cause actual performance and financial results in future periods to differ materially from any projections of future performance or result expressed or implied by such forward‐looking statements. These risks and uncertainties include, but are not limited to: general business, economic and competitive uncertainties; the actual results of current and future exploration activities; conclusions of economic evaluations; meeting various expected cost estimates; benefits of certain technology usage; changes in project parameters and/or economic assessments as plans continue to be refined; future prices of metals; possible variations of mineral grade or recovery rates; the risk that actual costs may exceed estimated costs; geological, mining and exploration technical problems; failure of plant, equipment or processes to operate as anticipated; accidents, labor disputes and other risks of the mining industry; delays in obtaining governmental approvals or financing; risks related to local communities; the speculative nature of mineral exploration and development (including the risks of obtaining necessary licenses, permits and approvals from government authorities); title to properties; and other factors beyond the Company's control and as well as those factors included herein and elsewhere in the Company's public disclosure. Although the Company has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in the forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. Readers are advised to study and consider risk factors disclosed in Integra's Annual Information Form dated March 24, 2026 for the fiscal year ended December 31, 2025, which is available on the SEDAR+ issuer profile for the Company at www.sedarplus.ca and available as Exhibit 99.1 to Integra's Form 40-F, which is available on the EDGAR profile for the Company at www.sec.gov.

Investors are cautioned not to put undue reliance on forward-looking statements. The forward-looking statements contained herein are made as of the date of this news release and, accordingly, are subject to change after such date. The Company disclaims any intent or obligation to update publicly or otherwise revise any forward-looking statements or the foregoing list of assumptions or factors, whether as a result of new information, future events or otherwise, except in accordance with applicable securities laws. Investors are urged to read the Company's filings with Canadian securities regulatory agencies, which can be viewed online under the Company's profile on SEDAR+ at www.sedarplus.ca.

Cautionary Note Regarding Non-GAAP Financial Measures

Alternative performance measures in this news release such as "cash cost", "AISC", "free cash flow" and "sustaining capital costs" are furnished to provide additional information. These non-GAAP performance measures are included in this news release because these statistics are used as key performance measures that management uses to monitor and assess performance of Florida Canyon, and to plan and assess the overall effectiveness and efficiency of mining operations. These performance measures do not have a standardized meaning within International Financial Reporting Standards ("IFRS") and, therefore, amounts presented may not be comparable to similar data presented by other mining companies. These performance measures should not be considered in isolation as a substitute for measures of performance in accordance with IFRS.

Cash Costs

Cash costs include site operating costs (mining, processing, site G&A), refinery costs and royalties, but excludes head office G&A and exploration expenses. While there is no standardized meaning of the measure across the industry, the Company believes that this measure is useful to external users in assessing operating performance.

Site-Level All-In Sustaining Cost

Site-level AISC includes cash costs and sustaining capital, but excludes head office G&A and exploration expenses. The Company believes that this measure is useful to external users in assessing operating performance and the Company's ability to generate free cash flow from potential operations.

Free Cash Flow

Free cash flows are revenues net of operating costs, royalties, capital expenditures and cash taxes. The Company believes that this measure is useful to the external users in assessing the Company's ability to generate cash flows from the Project.

Cautionary Note for U.S. Investors Concerning Mineral Resources and Reserves

NI 43-101 is a rule of the Canadian Securities Administrators which establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. Technical disclosure contained in this news release has been prepared in accordance with NI 43-101 and the Canadian Institute of Mining, Metallurgy and Petroleum Classification System. These standards differ from the requirements of the U.S. Securities and Exchange Commission ("SEC") and resource and reserve information contained in this news release may not be comparable to similar information disclosed by domestic United States companies subject to the SEC's reporting and disclosure requirements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

SOURCE Integra Resources Corp.