Integra Resources Corp.

7. Development Projects

Integra’s 2025 DeLamar Project MPO, has been determined to be administratively complete, meeting the content requirements at 43 CFR 3809.401(b). The MPO will serve as the basis for BLM’s environmental review of the Project under NEPA. Following the publishing of the NOI in Q2 2026, Public and Agency Scoping will identify environmental concerns (issues) associated with Project implementation. These issues will inform the development of potential alternatives. Environmental effects analysis of the Project and a reasonable range of alternatives will then proceed and an Environmental Impact Statement (EIS) will be prepared. In the EIS and accompanying record of decision, anticipated in Q3 2027, the BLM will identify a Preferred Alternative and any required mitigation measures required for Project implementation. Following the NEPA process, a final revised Project MPO will be prepared that incorporates the Preferred Alternative and any identified mitigation measures. Once all applicable Federal, State and Local permits are obtained, the Project will commence construction.

The DeLamar Project’s permitting timeline posted to the FAST-41 project dashboard on January 13, 2026. The FAST-41 Transparency Project program is a federal permitting framework designed to streamline environmental reviews, improve interagency coordination, and increase transparency. Agencies must develop and maintain a coordinated, project-specific timetable for all required environmental review and permitting actions. Integra will be designated a dedicated project advisor from the Permitting Council, who will monitor the advancement of the project – maintaining active engagement and coordination across multiple regulatory agencies. The Permitting Council provides high-level oversight to ensure that Federal agencies adhere to established timetables. The DeLamar Project’s permitting timeline posted to the FAST-41 project dashboard highlights an accelerated 15 month NEPA schedule from start to finish.

The Company completed its FS for DeLamar Heap Leach Project with an effective date December 8, 2025. The FS for DeLamar confirmed robust economics for a low-cost, large-scale, conventional open pit oxide heap leach operation, with competitive operating costs and a high rate of return. The FS outlines total production of 1.1 million ounces of gold equivalent (“AuEq”) over a 10-year operating mine life (plus two years of residual leaching), resulting in an average annual production profile of 106,000 ounces AuEq per annum at a co-product Mine-site AISC of $1,480 per ounce (“/oz”) AuEq. Initial capital cost are $389 million, including $38 million of owners’ cost, and sustaining capital of $305 million over the mine life. The Project generates an after-tax net present value (“NPV5%”) of approximately $774 million with an after-tax internal rate of return (“IRR”) of 46% at base case gold and silver prices of $3,000/oz and $35/oz, respectively. After-tax NPV5% improves to approximately $1.9 billion and after-tax IRR to 97% using recent gold and silver prices of $4,500/oz and $65/oz, respectively.

During the quarter the Company also advanced the Nevada North Project, which consists of the Wildcat Deposit and the Mountain View Deposit. A preliminary hydrogeological study was initiated at Wildcat to develop a hydrogeological conceptual site model (HCSM) and to assess potential water management and supply issues impacting mining and reclamation planning. Four monitoring wells have been installed under an existing Notice authorization, and will provide data related to groundwater depth, flow direction and water quality. Further hydrogeological studies are planned for 2026 and will be informed by these preliminary data. The environmental analysis for the Wildcat Exploration Plan of Operations ("EPO") is complete, and decision documentation will be complete pending approval of a Memorandum of Agreement with the State Historical Preservation Office and Tribal governments. Once approved, the Wildcat EPO will provide greater flexibility for significantly expanded exploration and drilling campaigns that will initiate in 2026. The Reclamation Permit from Nevada Division of Environmental Protection ("NDEP") Bureau of Mining Regulation and Reclamation ("BMRR") is also in process and anticipated in Q2 2026.

At Mountain View, environmental analysis for the EPO is also complete. The Mountain View EPO has completed its 30-day public comment period, and a Final Environmental Assessment was published in Q4 2025. The NDEP BMRR Reclamation Permit is anticipated in Q2 2026. Once approved, the Mountain View EPO will provide greater flexibility for significantly expanded exploration and drilling campaigns in the future. Integra expects to begin work on an updated technical report for Nevada North in 2026 with a target release date in early 2027.

External Affairs activities for the quarter maintained broad stakeholder engagement, with the most frequent stakeholder categories including local residents, civic and non-profit organizations, government and elected officials, and Tribal nations, totaling over 4,250 stakeholders engaged in Nevada, Idaho, and Oregon. Specific initiatives included workforce development planning, community wood-bank support, seasonal food-bank holiday drives, industry conferences, and Tribal Relationship Agreement implementation. Targeted engagement informing mine planning and design included regenerative grazing, park & ride location, reclamation planning, visual effects, Indigenous knowledge and cultural studies.