| Allegiant Begins Extensive Core Drilling Program to Test High Grade Gold Discovery at Eastside Project's McIntosh Zone 
 Diamond Core Program to Target Depth Extensions and Associated Structures
 
 thenewswire.com
 
 Tonopah, Nevada – TheNewswire - September 10, 2025 – Allegiant Gold Ltd. (“Allegiant” or the “Company”) (AUAU: TSX-V) (AUXXF: OTCQX) is  pleased to announce the commencement of a 2,000 metre, fully-funded  diamond core drill program testing the vertical extensions of the  high-grade gold discovery at the McIntosh zone within the Company’s  flagship Eastside Gold-Silver Project.  To date, approximately 1.4  million ounces of inferred gold and 8.8 million ounces of inferred  silver resources* have been estimated at the Eastside Project with only a  small fraction of the project area explored to date.  Eastside is  located in the prolific Walker Lane Trend near the town of Tonopah,  Nevada.
 
 *Source: “Updated Resource Estimate and NI 43-101  Technical Report, Eastside and Castle Gold-Silver Project Technical  Report, Esmeralda County, Nevada” conducted by Mine Development  Associates of Reno, Nevada, with an effective date of July 30, 2021.   Pit-constrained Inferred Resources (cut-off grade of 0.15 g/t Au) of  61,730,000 tonnes grading 0.55 g/t Au and 4.4 g/t Ag at the Original Pit  Zone (1,090,000 ounces gold and 8,700,000 ounces silver) and 19,986,000  tonnes grading 0.49 g/t Au at the Castle Area (314,000 ounces gold). A  copy of the Eastside Technical Report can be found on SEDAR at  www.sedar.com.
 
 PROGRAM HIGHLIGHTS:
 
 
 The 2025 core program builds on Allegiant’s highly  successful 2021 drilling campaign (see News Release Dated May 26, 2021),  which returned the highest-grade intercepts ever reported at Eastside:  Initial three-hole HQ core drill program (ES-331, ES-337,  ES-338) totaling approximately 2,000 metres as part of a larger 20,000  metre drill program.  
 
  Holes ES-331 and ES-338 will test the vertical extensions  of previously drilled Holes ES-239 and ES-243 down to a depth of 600  metres.  Hole ES-337 is designed to intersect various structures in the  high-grade zone discovered in the 2021 drill program and will total a  minimum of 600 metres in length.  
 
  Drilling is underway with results expected in October and November 2025.  
 
 
 
 The current program aims to test the vertical continuity and structural controls  of this mineralization through deeper core drilling beneath and around  holes ES-239 and ES-243, with one angled hole (ES-337) designed to  intersect potential mineralized structure at depth. The targets (see Map  1) were selected based on a comprehensive review of our exploration  model incorporating over 60,000 metres of drilling, geophysical,  geochemical, lithology and structural data. The exploration model shows a  strong correlation between grade and the known structures.  Hole ES-243: 148  metres of 2.6 g/t Au, including 14 metres of 21.9 g/t Au and 20 metres  of 173.8 g/t Ag and ending in 12.2 metres of 2.24 g/t Au  
 
  Hole ES-239: 3.1 metres of 39.0 g/t Au at the bottom of the hole, within a broader interval of 111.3 metres grading 1.45 g/t Au  
 
 
 MAP 1: DRILL HOLE LOCATION
 
 https://allegiantgold.com/site/assets/files/3144/pastedgraphic-1.png
 
 Peter Gianulis, CEO, commented, "We  are excited to have started our 2025-2026 drill program at Eastside;  this is our largest single program ever at Eastside where we anticipate  drilling approximately 20,000 metres of reverse circulation and diamond  core drilling.  We are commencing with diamond core drilling at the McIntosh Zone’s High-Grade Zone which has returned some of the best gold and silver intercepts  ever drilled at Eastside.  After further interpretation, we are now  testing what we believe could be the vertical continuation of these  bonanza-grade structures. If successful, this program could redefine the  growth potential of the Eastside deposit at depth. Upon completion and  interpretation of the property-wide geophysics program, we will begin  the reverse circulation drilling of the chosen targets.”
 
 QUALIFIED PERSON
 
 Andy Wallace is a Certified Professional Geologist (CPG)  with the American Institute of Professional Geologists and is the  Qualified Person under NI 43-101, Standards of Disclosure for Mineral  Projects, who has reviewed and approved the scientific and technical  content of this press release.
 
 ABOUT EASTSIDE
 
 Eastside is a district-scale, 100%-owned gold-silver  project located in Esmeralda County, Nevada, approximately 30+  kilometres west-northwest of Tonopah, along the prolific Walker Lane  Trend. The project hosts a current inferred resource (last updated in  July 2021) of 1.4 million ounces of gold and 8.8 million ounces of  silver, with mineralization open to the west, south and at depth.
 
 ABOUT ALLEGIANT
 
 Allegiant owns three highly prospective gold projects in  the United States all of which are in the mining-friendly jurisdiction  of Nevada. Allegiant’s flagship, district-scale Eastside project hosts a  large and expanding gold resource and is in an area of excellent  infrastructure. Less than 20% of the property has been explored with  potential to significantly increase the existing inferred resource.  Preliminary metallurgical testing indicates that both oxide and sulphide  gold mineralization at Eastside is amenable to heap leaching.
 
 ON BEHALF OF THE BOARD
 
 Peter Gianulis
 CEO
 
 For more information contact:
 
 Investor Relations
 ir@allegiantgold.com
 
 +1 786 252 4948
 
 Neither TSX Venture Exchange nor its  Regulation Services Provider (as that term is defined in policies of the  TSX Venture Exchange) accepts responsibility for the adequacy or  accuracy of this release.
 
 FORWARD LOOKING STATEMENTS
 
 Certain statements and information contained in this  press release constitute "forward-looking statements" within the meaning  of applicable U.S. securities laws and “forward-looking information”  within the meaning of applicable Canadian securities laws, which are  referred to collectively as "forward-looking statements". The United  States Private Securities Litigation Reform Act of 1995 provides a “safe  harbor” for certain forward-looking statements. Allegiant Gold Ltd.’s  (“Allegiant”) exploration plans for its gold exploration properties, the  drill program at Allegiant’s Eastside project, the preparation and  publication of an updated resource estimate in respect of the Original  Zone at the Eastside project, Allegiant’s future exploration and  development plans, including anticipated costs and timing thereof;  Allegiant’s plans for growth through exploration activities,  acquisitions or otherwise; and expectations regarding future maintenance  and capital expenditures, and working capital requirements.  Forward-looking statements are statements and information regarding  possible events, conditions or results of operations that are based upon  assumptions about future economic conditions and courses of action. All  statements and information other than statements of historical fact may  be forward-looking statements. In some cases, forward-looking  statements can be identified by the use of words such as “seek”,  “expect”, “anticipate”, “budget”, “plan”, “estimate”, “continue”,  “forecast”, “intend”, “believe”, “predict”, “potential”, “target”,  “may”, “could”, “would”, “might”, “will” and similar words or phrases  (including negative variations) suggesting future outcomes or statements  regarding an outlook. Such forward-looking statements are based on a  number of material factors and assumptions and involve known and unknown  risks, uncertainties and other factors which may cause actual results,  performance or achievements, or industry results, to differ materially  from those anticipated in such forward-looking information. You are  cautioned not to place undue reliance on forward-looking statements  contained in this press release. Some of the known risks and other  factors which could cause actual results to differ materially from those  expressed in the forward-looking statements are described in the  sections entitled “Risk Factors” in Allegiant’s Listing Application,  dated January 24, 2018, as filed with the TSX Venture Exchange and available  on SEDAR+ under Allegiant’s profile at www.sedarplus.ca. Actual results  and future events could differ materially from those anticipated in  such statements. Allegiant undertakes no obligation to update or revise  any forward-looking statements included in this press release if these  beliefs, estimates and opinions or other circumstances should change,  except as otherwise required by applicable law.
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