Integra Resources Corp. announced that it has filed a technical report for the updated Mineral Resource Estimate at the DeLamar and Florida Mountain Project located in southwestern Idaho. The MRE incorporates the results from the highly successful stockpile drill program completed in April 2023.

The stockpile drill program added an Indicated resource of 504,000 ounces ("oz") gold equivalent ("AuEq") and an Inferred resource of 46,000 oz AuEq. Including the 2023 DeLamar MRE, Integra now controls a total M&I resource of 6.2 million ounces ("Moz") AuEq and a total Inferred resource of 0.9Moz AuEq across its key projects located in Idaho and Nevada, representing one of the larger resource endowments in the Great Basin of the USA not controlled by a major mining company2. Stockpile & Backfill Resource Update: The maiden stockpile resource estimate contains an Indicated resource of 504 thousand ounces ("koz") AuEq at 0.37 grams per tonne ("g/t") AuEq, including 296koz gold ("Au") and 16.1Moz silver ("Ag") and an Inferred resource the company allocated a total of USD 4.6 million to the stockpile drill program which successfully resulted in the addition of >500kozs AuEq (M&I), representing the lowest discovery cost per ounce in the history of DeLamar.

Total DeLamar and Florida Mountain Resource Update: The total DeLamar M&I resource contains 4.8Moz AuEq at 0.60 g/t AuEq, including 2.9Moz Au and 142.7Moz Ag. Oxide-mixed Heap Leach Resource Update: The oxide and mixed heap leach portion of the M&I resource contains 2.6M oz AuEq at 0.50 g/t AuEq., including 1.6Moz Au and 73.9Moz Ag. The significantly increased oxide and mixed resource at DeLamar demonstrates the potential for an extended heap leach mine life in future phases of operations.

The highly successful stockpile drill program increased the oxide-and-mixed M&I resource at DeLamar by 25%, validating the Company's belief that the mineralized stockpile and backfill material at surface has the potential to significantly expand the heap leach mine life in next phases of operation. The results of the PFS on DeLamar included in the technical report titled "Technical Report and Preliminary Feasibility Study for the DeLamar and Florida Mountain Gold-Silver project, Owyhee County, Idaho, USA" dated March 22, 2022 with an effective date of January 24, 2022, remain unaffected by this MRE update and have been included in the Report. 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.

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.

Michael Gustin, C.P.G., of RESPEC, Reno, Nevada is an independent Qualified Person as defined by NI 43-101 and has reviewed and approved the contents of this news release. 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 southwest Idaho. These standards differ from the requirements of the U.S. Securities and Exchange Commission ("SEC") and resource information contained in this news release may not be comparable to a major mining company.