Integra Resources Corp. (TSX-V: ITR) (NYSE American: ITRG) is pleased to announce drill results from 20 additional drill holes, representing 4,960 meters, from the recently completed stockpile drill program at the DeLamar Project located in southwestern Idaho. The Company is also pleased to provide a corporate update regarding several of its properties located in western Nevada, which were acquired as part of the merger with Millennial Precious Metals Corp.

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 Pre-feasibility Study.

Drilling Highlights

• The Company has released 135 drill holes of the 321 drill holes completed during the 12,588 m stockpile drill program which was completed in April 2023.
• The latest drill results from DeLamar (North DeLamar), Sommercamp, Stockpile 1 and 2) include:
  • NDM-23-129: 0.40 grams per tonne gold and 23.67 g/t silver (0.70 g/t gold equivalent) over 85.34 m
  • NDM-23-049: 0.34 g/t Au and 20.14 g/t Ag (0.60 g/t AuEq) over 44.20 m
  • NDM-23-048: 0.26 g/t Au and 20.63 g/t Ag (0.53 g/t AuEq) over 88.39 m
  • NDM-23-029: 0.26 g/t Au and 22.89 g/t Ag (0.55 g/t AuEq) over 79.25 m
  • WD1-23-061: 0.18 g/t Au and 39.79 g/t Ag (0.69 g/t AuEq) over 21.34 m
• The latest drill results from Florida Mountain (Jacobs Gulch) include:
  • JG-23-119: 0.45 g/t Au and 8.45 g/t Ag (0.56 g/t AuEq) over 67.06 m
  • JG-23-088: 0.40 g/t Au and 7.55 g/t Ag (0.50 g/t AuEq) over 41.15 m
  • JG-23-189: 0.43 g/t Au and 28.88 g/t Ag (0.80 g/t AuEq) over 13.72 m
• The drill results announced today continue to demonstrate excellent gold equivalent grade and drill intercept widths with strong continuity throughout the stockpiled and backfill mineralized material.
• The Company has 7,368 meters of assays pending.
• 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.

Integra’s President, CEO & Director, Jason Kosec commented: “we are pleased to see more successful drill results from the stockpile drill program which demonstrate the strong continuity of mineralization within the previously mined material at DeLamar and Florida Mountain. The grade and intervals intercepted in this drill program have exceeded the team’s expectations and are in-line with or better than our original estimates, highlighting the potential for this material to significantly increase the heap leach mine life of the Project in future phases.”

Detailed Drill Results

The following table highlights selected intercepts from the DeLamar backfill and stockpile drill program announced today^1,2,3,4:

(1) Downhole thickness is true thickness.
(2) Intervals reported are uncapped.
(3) AuEq = g/t Au + (g/t Ag ÷ 77.70). Rounding may cause minor discrepancies in the AuEq column.
(4) Au recovery based on cyanide shakes (“AuCN”) run on all intervals with Au assay values >0.1 g/t.

The following table highlights selected intercepts from the Florida Mountain stockpile and backfill drill program announced today^1,2,3:

(1) Downhole thickness is true thickness.
(2) Intervals reported are uncapped.
(3) AuEq = g/t Au + (g/t Ag ÷ 77.70). Rounding may cause minor discrepancies in the AuEq column.

Follow the link below to view a cross section of the NDM stockpile:
https://integraresources.com/site/assets/files/2572/nr_june_2023_section_vf.pdf

The NDM stockpile cross section demonstrates the strong grade continuity within the mineralized stockpiles, with consistent grades above the heap leach cut-off grade. Assays are pending for drill holes NDM-23-146 and NDM-23-046, however, the Company expects the results to be in line with the other drilling completed at the NDM stockpile. The NDM stockpile is estimated to contain approximately 16 Mt of the approximate 60 Mt 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 resource estimate cut-off date, will be included in an updated resource estimate at the Project.

Follow the link below to view a drill collar location map for the DeLamar stockpile/backfill drill program:

https://integraresources.com/site/assets/files/2572/dc_-_bf_sp_1-2_-_2023-06sm.pdf

https://integraresources.com/site/assets/files/2572/dc_-_bf_nr_-_ndm_2023-06sm.pdf

Follow the link below to view a drill collar location map for Florida Mountain’s Jacobs Gulch and Tip Top drill program:

https://integraresources.com/site/assets/files/2572/dc_-_bf_fm_-_2023-06sm.pdf

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.

Corporate Update – Final Land Payment for Nevada Properties

On June 6, 2023, the Company completed the final land payment of US$2.5 million to Clover Nevada LLC, a private company controlled by Waterton Precious Metals Fund II Cayman, LP, to complete the acquisition of the Wildcat Property, the Mountain View Property, the Ocelot Property, the Dune Property, the Eden Property, and the Marr Property. Following completion of the final payment, Waterton’s deed of trust encumbering the Nevada Properties was released and title now resides with the Integra subsidiaries.

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. 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 (AA) 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.

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.

Qualified Person

The scientific and technical information contained in this news release has been reviewed and approved by Raphael Dutaut, Ph.D (P.Geo), 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.

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. Since acquiring the Project in 2017, the Company has demonstrated significant resource growth and conversion while providing robust economic studies in its maiden preliminary economic assessment and Pre-Feasibility Study. An independent technical report for the PFS on the DeLamar Project has been prepared in accordance with the requirements of NI 43-101 and is available under the Company’s profile at www.sedar.com.

About Integra Resources

Integra is one of the largest precious metals exploration and development companies in the Great Basin of the Western USA. 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 USA focused mid-tier gold and silver producer.