Mr. George Salamis reports

INTEGRA ANNOUNCES ACCEPTANCE OF MINE PLAN OF OPERATIONS FOR DELAMAR PROJECT

Integra Resources Corp.'s updated mine plan of operations (MPO) for the DeLamar project has been determined by the U.S. Bureau of Land Management (BLM) to have met the content requirements of the U.S. Code of Federal Regulations (CFR), Title 43, Subpart 3809.

Highlights:

• The BLM's determination of administrative completeness is a critical step in permitting DeLamar and considers nearly three years of environmental baseline studies, initial engineering design and mine plan optimization. Integra's description of mining and reclamation activities proposed for the project will serve as the basis for the BLM's environmental review in accordance with the National Environmental Policy Act (NEPA).
• The updated MPO was submitted to the BLM earlier in 2025 and underwent the initial completeness review as prescribed by the CFR. Integra worked closely with the BLM to address comments provided on the MPO to achieve this milestone for DeLamar.
• The updated MPO includes several refinements from prior iterations:
  • Addresses agency comments and concerns;
  • Prioritizes placement of mine features on previously disturbed ground and relocates select features to reduce potential for impacts to surface and water quality;
  • Leverages the refining capacity of Integra's Florida Canyon mine to reduce ore processing activities and associated electrical power demands at DeLamar;
  • Incorporates project updates as part of the continuing feasibility study for DeLamar, which is expected to be announced in the fourth quarter of 2025.
• Key next steps include the BLM developing the project schedule and publishing the notice of intent (NOI), which will allow for the commencement of work on the environmental impact statement (EIS). The NOI step of the NEPA permitting process is crucial as it begins formal engagement with all co-operating governmental agencies and stakeholders.
• DeLamar is one of the few gold-silver development projects in the Western United States that will be actively advancing through the NEPA mine-permitting process, demonstrating the significant scarcity value of the project.
• Integra recently entered into a relationship agreement with the Shoshone-Paiute Tribes of the Duck Valley Indian Reservation, establishing a transformative and long-term partnership for the development of DeLamar.

George Salamis, president, chief executive officer and director of Integra, commented: "The acceptance of the updated MPO for DeLamar highlights the quality and scarcity value of the DeLamar project. Incorporating several years of environmental baseline studies, initial engineering design, and descriptions of mining and reclamation activities, the acceptance of the refined MPO represents a major milestone on the path to permitting mining activities at DeLamar. This major permitting achievement, along with the recently announced relationship agreement with the Shoshone-Paiute Tribes, clearly demonstrate Integra's commitment to advancing DeLamar toward a production decision. The company looks forward to continuing to work with the BLM through the NEPA process and remains committed to responsible mining practices, environmental protection and serving community interests."

Next steps

The BLM will publish the NOI in the federal register to notify government agencies and the general public about the proposed actions at DeLamar. The NOI is a formal announcement of intent to prepare an EIS as defined by NEPA. The NOI is followed by a public scoping process, which includes engagement with federal, state and local agencies as well as the general public to determine the issues and concerns associated with the project. Once the project has undergone agency and public scoping, an EIS document will be prepared.

The EIS process includes an analysis of potential environmental effects from project implementation on resources, including air, water, wildlife habitat, land use, native American concerns, socio-economic, visual resources, cultural resources, vegetation, soils, recreation, range resources and potential risks to human health. It also evaluates reasonable alternatives to the proposed action to minimize adverse effects and prevent undue degradation.

Throughout the EIS process, the company will continue work on various permits, several of which are required to be in place prior to construction, including a groundwater point of compliance permit to protect beneficial use of groundwater, Idaho pollution discharge elimination system permit to determine appropriate surface water discharge quality criteria for treated industrial waste water, a cyanidation permit, an air quality permit to construct as well as Section 404 of the Clean Water Act with the U.S. Army Corps of Engineers.

The company continues to engage with tribal nations as it advances toward the initiation of the programmatic agreement (PA) process. The PA is a formal document established between the company, governmental agencies and tribal nations. The PA includes framework for identifying, managing and mitigating any potential impacts on culturally sensitive areas or historical sites.

DeLamar project overview

The past-producing DeLamar project, which includes the adjacent DeLamar and Florida Mountain gold and silver deposits, is located in Owyhee county in southwestern Idaho. Since acquiring the project in 2017, the company has demonstrated significant resource growth and conversion while providing robust economic studies in its maiden preliminary economic assessment and prefeasibility study. The company expects to announce the results of an updated feasibility study in the fourth quarter of 2025. The most recent technical report is available on the company's website and has been filed on SEDAR+ and EDGAR.

About Integra Resources Corp.

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 (mergers and acquisitions) while upholding the highest industry standards for environmental, social and governance practices.

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