Mr. Christopher Herald reports

SOLITARIO INTERSECTS 1,445 GRAMS/TONNE SILVER OVER 1.2 METERS; COMPLETES PHASE 1 DRILLING CAMPAIGN AT GOLDEN CREST; AWAITING DRILLING PERMITS TO BEGIN PHASE 2 DRILLING AT PONDEROSA

Solitario Resources Corp. has intersected 1,445 grams per tonne silver (46.5 ounces) in drill hole GC-012. This high-grade interval represents an unrecognized style of precious metal mineralization not only for the Golden Crest project, but unique compared with mineralization in the historic Homestake and Wharf mining areas.

The high-grade silver intercepted in hole GC-012 between 164.0 to 165.2 metres (538 and 542 feet) appears to be associated with a clay-rich alteration zone of the Winnipeg formation. Core above and below this mineralized intercept is currently being assayed.

Chris Herald, president and chief executive officer of Solitario, stated: "We were surprised to intersect this very high-grade silver intercept in GC-012. The mineralized core interval, although clay-altered, was not visually that impressive to host such high-grade mineralization. We are reviewing adjacent core holes to sample potentially similar mineralization.

"As we await approval of the Ponderosa drilling permit, Solitario is launching a gravity survey that will cover Ponderosa and several other targets at Golden Crest. This work is designed to sharpen our understanding of the geologic architecture of the district and prioritize the most compelling drill targets as we prepare to resume drilling with two core rigs. Ponderosa continues to demonstrate the strongest and largest surface gold mineralization on the property, and our well positioned drill sites provide an exceptional opportunity to unlock the potential of these exciting new target areas."

Phase 1 drilling completed at Golden Crest

With the seven holes completed during the 2025 summer field season (2,653 metres), a total of 18 holes (7,000 metres) have now been drilled on the Golden Crest property. Seven of the first 15 holes intersected significant mineralization. Most of the drilling was widespread, mainly over the western portion of the property. Assays are pending for the final three holes. Besides the high-grade silver intercept in GC-012; GC-012X and GC-013 had multiple intervals in excess of 30 parts per billion gold, grading up to 0.57 gram per tonne gold, with highly elevated pathfinder elements, indicating that gold deposition was active throughout most of the western portion of the property.

Phase 2 drilling at Ponderosa

Phase 2 drilling on the Ponderosa side of the Golden Crest property is set to begin as soon as permits are received. The company is awaiting the United States Forest Service's final decision and are targeting a late-October start. With drilling permitted between May 15 and Dec. 15, the upcoming program will provide an excellent opportunity to further advance Golden Crest. Building on the strong results from phase 1, the Ponderosa plan of operations includes more than 40 drill hole locations, offering significant potential for new discoveries.

Sample type, sampling methodology, chain of custody, quality control and assurance

All Golden Crest exploration core samples have been prepared and analyzed at the American Assay Laboratories in Reno, Nev., which is independent from Solitario. Thorough QA/QC (quality assurance/quality control) 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 collected directly from the drill rig, logged, photographed, split into two samples and half of each sample submitted directly to American Assay Labs through secure chain of custody protocols. All activities prior to shipment are directly supervised by Solitario geologists. Samples are pulverized from a 250-gram sample to 85 per cent passing 75 mesh. Approximately 225 g of pulp sample is prepared for fire assay. Assays are based on a 30 g fire assay aliquot for gold with atomic absorption finish. If the gold value from atomic absorption is greater than 10 grams per tonne, or greater than 100 g/t Ag, an additional 30 g of pulp sample is fire assayed for gold and/or silver using a gravimetric finish.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Walter Hunt, a qualified person as defined by National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

About Solitario Resources Corp.

Solitario is a natural resource exploration company focused on high-quality Tier 1 gold and zinc projects. Solitario's 100-per-cent-owned Golden Crest properties in South Dakota constitute strategic landholdings along the western and southwestern extensions of the Homestake-Wharf mining district that has produced approximately 52 million ounces of gold. The project area is located in a safe jurisdiction with highly developed infrastructure, an unbroken 150-year record of continuous gold mining, a skilled mining work force and a history of high-grade, underground mineable gold deposits.

The company is traded on the NYSE American (XPL) and on the Toronto Stock Exchange (SLR). In addition to its South Dakota property holdings, Solitario holds a 50-per-cent joint venture interest (Teck Resources 50 per cent) in the high-grade Lik zinc deposit in Alaska and a 39-per-cent joint venture interest (Nexa Resources holds the remaining 61-per-cent interest) on the high-grade Florida Canyon zinc project in Peru. Solitario is carried to production through its joint venture arrangement with Nexa.

Solitario's management and directors hold approximately 8.4 per cent (excluding options) and Newmont Corp. owns 9.4 per cent of the company's 90.3 million shares outstanding. Solitario's cash balance and marketable securities stand at approximately $8.0-million (U.S.).

We seek Safe Harbor.