Integra Resources Corp. announced the commencement of drilling on an estimated 60 Mt of low-grade, stockpiled gold-silver mineralized material at the DeLamar and Florida Mountain deposits. This material was stockpiled at surface by previous operators and has the potential, pending further drilling, to significantly increase the heap leach mine life and production rates at the Project.

This drill program is designed to estimate grade and grade variability within the stockpiles as well as to obtain material for metallurgical testwork to further understand the potential inclusion of this material in future mine plans and heap leach processing. The total drill program will include 11,000 m of shallow, dual rotary reverse circulation drilling and sonic drilling. The Proof of Concept: Evidence of Grade in Stockpiles and Backfill: The Company has drilled through backfill and low-grade stockpiles on a number of occasions through normal course drilling on the Project since 2018.

This drilling, in addition to historic drilling from previous operators, provides a strong case to substantiate the potential mineralization in these stockpiles and backfill. Execution of Drill Program: Methodology and Timeline: The stockpile drilling program will be executed at 60 m collar spacing with select 30 m infill test holes. All drilling will be vertical through the entirety of the stockpiles.

This drilling will be conducted by a combination of dual rotary RC and sonic drilling methods. Both these drilling methods will serve to maintain high sample quality through the drilling process. Additionally, the two sampling methods will provide a basis for comparison for continuity.

Sampling will be conducted at 1.5 m intervals for the whole of the drilling with all samples sent to a third-party lab for analysis. These drilling methods provide the opportunity for various metallurgical tests, as well. Bottle rolls will be collected on crushed material and column testing is planned for select material obtained with the sonic drill.

Once begun the drilling will take approximately three months to complete at 60 m spacings. Description of the PFS Mine Plan and Heap Leach Focus: The Company's 2022 PFS study demonstrated a robust, economic project with significant optionality and upside potential. The Company has commenced permitting and plans to commence development and operation of the project with a low-cost, high-margin 35,000 tonne per day (“mtpd”) heap leach facility.

The simple, low-cost, low-risk strategy to focus on the financial engine of the project, the heap leach, does not negate the strong optionality of the project in multiple areas. Based on internal models generated by the Company, adding Oxide and Mixed material to the heap leach significantly increases the mine life and is very accretive to the Project's value, at a very low-cost. Advancing the DeLamar gold-silver project towards permitting and development of the heap leach stage as a stand-alone mining operation, is a far lower cost, lower risk option for the Company and its shareholders, creating strong economic returns and rapid payback.

In these inflationary times, with increased scrutiny on permitting of all resource projects, this is the optimal strategy for the Company and its shareholders, as it vastly reduces execution risk. Adding stockpiled and backfill material residing at surface, with little or no stripping required, subject to successful delineation and inclusion in future mine plans, has phenomenal value-add potential at a very low-cost.