Mr. Jason Kosec reports

INTEGRA ANNOUNCES ADDITIONAL OXIDE DRILL RESULTS FROM STOCKPILE DRILL PROGRAM AT DELAMAR, INCLUDING 0.92 G/T AUEQ OVER 40 M AND 0.52 G/T AUEQ OVER 111 M

Integra Resources Corp. has released drill results from 20 additional drill holes, representing 1,009 metres, from the stockpile drill program at the DeLamar project, located in southwestern Idaho.

The stockpile drill program at DeLamar was designed to test a large portion of the estimated 60 million tonnes 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 prefeasibility study (PFS).

Drilling highlights:

• The latest drilling highlights from DeLamar (North DeLamar, Sommercamp, stockpiles 1 and 2) include:
  • NDM-23-047 -- 0.30 gram per tonne gold and 17.38 g/t silver (0.52 g/t gold equivalent) over 111.25 metres;
  • NDM-23-045 -- 0.29 g/t Au and 18.54 g/t Ag (0.53 g/t AuEq) over 74.68 m;
  • NDM-23-031 -- 0.25 g/t Au and 16.45 g/t Ag (0.46 g/t AuEq) over 85.34 m;
  • WD1-23-168 -- 0.65 g/t Au and 20.91 g/t Ag (0.92 g/t AuEq) over 39.62 m, including 12.51 g/t Au and 31.04 g/t Ag (12.91 g/t AuEq) over 1.52 m.
• The latest drilling highlights from Florida Mountain (Jacobs Gulch and Tip Top) include:
  • JG-23-046 -- 0.35 g/t Au and 7.83 g/t Ag (0.45 g/t AuEq) over 35.05 m;
  • JG-23-158 -- 0.42 g/t Au and 7.30 g/t Ag (0.51 g/t AuEq) over 39.62 m;
  • JG-23-097 -- 0.35 g/t Au and 7.34 g/t Ag (0.45 g/t AuEq) over 35.05 m.
• The drill results released today continue to demonstrate excellent gold equivalent grade and drill intercept widths with strong continuity throughout the stockpile and backfill mineralized material.
• The company has released 155 drill holes of the 321 drill holes completed during the 12,588 m stockpile drill program, which was completed in April, 2023.
• Following the successful release of the updated mineral resource estimate and preliminary economic assessment (PEA) for the Wildcat and Mountain View projects, the company is currently focused on delivering an updated mineral resource estimate for DeLamar in the third quarter of 2023, including the stockpile drilling, as well as the submission of the mine plan of operations at DeLamar in Q4 2023.

Jason Kosec, president, chief executive officer and director, commented: "The drill results announced today continue to demonstrate significant intervals of mineralization with strong grade continuity at our flagship DeLamar project. The mineralized material, which was mined and stockpiled by previous operators, has the potential to significantly increase the heap-leach mine life of the project in future phases, further enhancing the robust economics presented in the 2022 prefeasibility study. The team is currently working to deliver an updated mineral resource estimate for DeLamar, which will include drilling from the stockpiles, later this quarter."

Detailed drill results

An attached table highlights selected intercepts from the DeLamar backfill and stockpile drill program released today.

An attached table highlights selected intercepts from the Florida Mountain backfill and stockpile drill program released today.

The Jacobs Gulch stockpile is estimated to contain approximately 8.9 million tonnes of the approximate 60 million tonnes of mineralized material that was stockpiled and/or used as backfill by previous operators. Drill spacing is completed at 60 m, with some areas drilled at 30 m spacing to further confirm continuity. The stockpile drilling, along with additional drilling that occurred after the last mineral resource estimate cut-off date, will be included in an updated mineral resource estimate at the project in Q3 2023.

Cyanide shake analysis is not performed on Florida Mountain samples, as gold occurrences in Florida Mountain material can often be coarse in nature, making comparisons between cyanide shake analyses and fire assays unreliable. Once pulverized, as per any cyanide shake procedure, all Florida Mountain material show high recoveries by cyanidation, rendering cyanide shake analysis unreliable for differentiating between ores that can be heap leached and those requiring grinding to achieve high recoveries.

Sampling and quality assurance/quality control procedure

Thorough quality assurance/quality control protocols are followed on the project, including the insertion of duplicate, blank and standard samples in the assay stream for all drill holes. The samples are submitted directly to American Assay Laboratories in Reno, Nev., for preparation and analysis. Analysis of gold is performed using the fire assay method with atomic absorption finish on a one-assay-ton aliquot. Gold results over five g/t are rerun using a gravimetric finish. Silver analysis is performed using ICP for results up to 100 g/t on a five-acid digestion, with a fire assay/gravimetric finish for results over 100 g/t silver.

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 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 laboratory for analysis. The sonic drilling provided material suitable for continuing comprehensive metallurgical testwork.

Qualified persons

The scientific and technical information contained in this news release has been reviewed and approved by Raphael Dutaut, PhD (PGeo), Integra's vice-president, exploration, and Tim Arnold (PE, SME), Integra's chief operating officer. Both individuals are qualified persons, as defined in National Instrument 43- 101 -- Standards of Disclosure for Mineral Projects.

About Integra Resources Corp.

Integra is one of the largest precious metal exploration and development companies in the Great Basin of the Western United States. Integra is currently focused on advancing its three flagship oxide heap-leach projects: the past-producing DeLamar project, located in southwestern Idaho, and the Wildcat and Mountain View projects, located in western Nevada. The company also holds a portfolio of highly prospective early-stage exploration projects in Idaho, Nevada and Arizona. Integra's long-term vision is to become a leading United States-focused, mid-tier gold and silver producer.

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