Integra Resources Corp. announce an updated Mineral Resource Estimate (?MRE?) for the DeLamar and Florida Mountain Deposits (together ?DeLamar? or the ?Project?) located in southwestern Idaho that incorporates the results from the highly successful stockpile drill program completed in April 2023.

The stockpile drill program added a Measured and Indicated (?M&I?) resource of 504,000 ounces (?oz?) gold equivalent (?AuEq?)1 and an Inferred resource of 46,000 oz AuEq. The mineralized stockpile and backfill material that was incorporated into the updated DeLamar MRE demonstrates the potential for this material to significantly increase the heap leach mine life in future phases. The updated DeLamar MRE increased the total heap leachable oxide-and-mixed ounces within the M&I category by ~25% and increased the total Inferred ounces by ~31%.

In total, ~90% of the updated MRE falls within the M&I category, highlighting the quality and scarcity of projects such as DeLamar in the prolific Great Basin mining district of the USA. The stockpile drill program was designed to test a large portion of the approximately 49 million tonnes (?Mt?) of mineralized material at the DeLamar deposit and 11 Mt of mineralized material at the Florida Mountain deposit. This mineralized material was blasted and mined by previous operators and either stockpiled or used as backfill because the material fell below the mill cut-off grade.

The stockpile drill program was executed at nominal 60 m collar spacings with select 30 m infill test holes to further verify grade and variability. All drilling was vertical through the entirety of the stockpiles and backfill material. The drilling was conducted by a combination of sonic and reverse circulation with casing advance drilling methods.

Both these drilling methods were chosen to maintain high sample quality and integrity throughout the drilling process. Additionally, the two drilling methods provided a basis for continuity comparison. Sampling was conducted at 1.5 m intervals for the whole of the drilling program, with all samples sent to a certified third-party lab for analysis.

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 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 MRE 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 MRE.

The MRE technical report is intended to be read as a whole, and sections should not be read or relied upon out of context.