Integra Resources Corp. announced drill results from 21 additional drill holes, representing 860 meters (‘m'), from the recently completed stockpile drilling program at the DeLamar Project (‘DeLamar' or the ‘Project') located in southwestern Idaho. The Stockpile drilling program at DeLamar was designed to test a large portion of the estimated 60 million tonnes (‘Mt') of mineralized material that was stockpiled and/or used as backfill at the Project.

The Company believes that additional oxide-and-mixed material from the stockpiles and backfill at DeLamar has the potential to significantly increase the heap leach mine life of the Project in future phases and further bolster the robust economics presented in the Company's 2022 Pre-feasibility Study. Integra is currently focused on achieving several key milestones in 2023, including an updated mineral resource estimate and the submission of the Mine Plan of Operations at DeLamar, as well as an updated mineral resource estimate and Preliminary Economic Study at the Wildcat & Mountain View Projects, located in western Nevada. Drilling Highlights: The stockpile drilling program at DeLamar was completed in April 2023 and consisted of 321 holes, totalling 12,588 m. The latest drill results from DeLamar (North DeLamar, Sommercamp, Stockpile 1 and 2) include: NDM-23-118: 0.38 grams per tonne (‘g/t') gold (‘Au') and 22.52 g/t silver (‘Ag') (0.67 g/t gold equivalent (‘AuEq')) over 80.77 m; WD1-23-299: 0.31 g/t Au and 20.63 g/t Ag (0.58 g/t AuEq) over 48.77 m; NDM-23-199: 0.29 g/t Au and 14.34 g/t Ag (0.48 g/t AuEq) over 85.34 m; NDM-23-021: 0.21 g/t Au and 22.61 g/t Ag (0.50 g/t AuEq) over 54.87 m; NDM-23-053: 0.26 g/t Au and 20.91 g/t Ag (0.53 g/t AuEq) over 50.29 m. · The latest drill results from Florida Mountain (Jacobs Gulch and Tip Top) include: JG-23-027: 0.38 g/t Au and 11.85 g/t Ag (0.53 g/t AuEq) over 27.43 m; JG-23-075: 0.34 g/t Au and 15.25 g/t Ag (0.54 g/t AuEq) over 21.34 m; JG-23-100: 0.33 g/t Au and 6.04 g/t Ag (0.40 g/t AuEq) over 70.10 m. Observations are consistent with previously reported results from the stockpile drilling program, with results demonstrating excellent gold equivalent grade and drill intercept widths with strong continuity throughout the material.

Final drill samples have been shipped to the assay lab and estimation work has commenced for the updated mineral resource estimate at DeLamar, including results from the stockpile drilling program. Results from 8,229 m, representing 226 drill holes, have yet to be released. The Company will continue to release results as they are received from the lab.

Execution of Drill Program – Methodology: The stockpile drill program was executed at 60 m collar spacings with select 30 m infill test holes to further verify grade variability in future resource estimation and to provide additional metallurgical samples. All drilling was vertical through the entirety of the stockpiles and backfill material. The drilling was conducted by a combination of Sonic and traditional reverse circulation (‘RC') with casing advance drilling methods.

Both these drilling methods 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 third-party lab for analysis.

The Sonic Drilling provided material suitable for ongoing comprehensive metallurgical test work.