Mr. Robert Cameron reports

ENDURO METALS ANNOUNCES RESULTS OF ROCK SAMPLING AT THE NEWMONT LAKE PROJECT, GOLDEN TRIANGLE, BC

Enduro Metals Corp. has released results from its 2025 rock sampling program at its 100-per-cent-owned Newmont Lake project in the heart of British Columbia's Golden Triangle. Assays confirmed the discovery of a large, newly recognized porphyry copper-gold system at the Andrei target with widespread copper and gold values. Additionally, exceptionally high-grade gold and silver samples underscored the potential of undrilled areas from the Camp zone within the McLymont area.

The 2025 program, conducted from July through September, focused on the Andrei porphyry Cu-Au target and structurally controlled epithermal and skarn gold targets in the McLymont area, a region that includes the historic NW zone resource and the nearby Camp zone. The Newmont Lake project is one of the largest contiguous claim packages (688 square kilometres) in the Golden Triangle strategically located near major porphyry copper-gold development projects, including Galore Creek (Newmont-Teck Resources) and KSM (Seabridge Gold), as well as past-producing high-grade gold mines at Snip and Eskay Creek (currently being put back into production by Skeena Gold & Silver). Seabridge Gold's recent North Snip porphyry discovery lies near the southern property boundary.

2025 highlights

Andrei porphyry copper-gold target:

• Widespread copper mineralization, with highest grade samples exceeding 10 per cent copper;
• 25 per cent of samples returned values above 0.1 per cent Cu, confirming extensive mineralized footprint;
• Mineralization occurs in potassic-altered monzonite intrusions and adjacent volcanic rocks, consistent with the margins of a large porphyry Cu-Au system;
• Mineralization occurs on the flanks of a four-kilometre-long, open-ended induced polarization chargeability anomaly interpreted to represent a porphyry Cu-Au centre buried beneath faulted cover rocks;
• Andrei correlates with a strong magnetic high anomaly, part of a 14-kilometre-long corridor that also includes the FK and Southmore porphyry targets;
• 2026 drill program is in advanced planning.

McLymont/Camp zone gold targets:

• Rock samples at Camp zone returned gold values of up to 110 grams per tonne gold with 142 g/t silver;
• Results confirm the presence of high-grade gold mineralization in an area of historical exploration significance prior to the discovery of the NW zone;
• Camp zone mineralization interpreted as structurally controlled, associated with alteration and veining along the McGilvery fault, a significant regional structure running parallel to the McLymont fault.

Rob Cameron, chief executive officer of Enduro Metals, commented: "The Andrei target represents the most compelling copper-gold opportunity identified to date on the Newmont Lake project. The combination of strong surface copper mineralization on the flanks of a large four-kilometre IP anomaly and coincident magnetic anomalies supports our interpretation of a major buried porphyry copper-gold system. These results are directly shaping drill targeting as we advance toward an inaugural drill program in 2026. At the Camp zone, exceptionally high gold grades reaffirm the prospectivity of an area that was a focus of early exploration before attention shifted to the NW zone."

2025 work program

A total of 351 rock samples were collected across the Newmont Lake project during the 2025 field season. A total of 176 samples were collected from the Andrei target area, which is a large, low-elevation and easily accessible porphyry copper-gold target located in the northern portion of the property. Additional sampling included targets within the McClymont gold structure and within the Camp zone structurally controlled vein system. Reconnaissance samples were collected in a number of other sites on the property.

The Andrei target was also covered by induced polarization and magnetic surveys in 2025. The surveys outlined an open-ended 4.0-kilometre-by-1.2-kilometre zone of elevated chargeability coincident with high-resistivity and high-magnetic values centred on the central ridge. The copper occurrences sampled are located on the flanks of this geophysical feature, with the core of the anomaly buried beneath postmineral cover (see press release dated Oct. 6, 2025, "Enduro Metals Geophysics Defines 4 km Andrei Target at Newmont Lake").

Samples collected in 2025 were primarily grab samples. Such samples are selective in nature and are not necessarily representative of the overall mineralized system but are effective in identifying areas of potential cohesive mineralization (see table 1 below).

Andrei geology and mineralization

Detailed rock sampling at Andrei was focused primarily on newly exposed bedrock revealed by glacial retreat, together with sampling of adjacent porphyry targets. Results identified widespread copper mineralization associated with highly altered monzonite intrusions and surrounding volcanic rocks. When combined with Enduro's previous sampling and results from previous operators, the 2025 program delineated a large and semi-continuous zone of elevated to high copper mineralization with locally elevated gold values. Geological mapping indicates that the Andrei porphyry system is centred on a dense network of potassic-altered monzonite dikes and plugs intruding basalt and andesite volcanic rocks. This monzonite complex correlates well with magnetic highs that define a 14-kilometre-long corridor of prospective porphyry copper-gold potential.

Andrei is a low-sulphur mineralized system where magnetite and minor hematite are the dominant alteration minerals, occurring in replacement zones, breccia infill and vein networks. Alteration is characterized by an inner propylitic assemblage of magnetite, chlorite, pyrite stockworks, epidote and quartz veins, with copper mineralization occurring primary as chalcopyrite with minor bornite. A crosscutting iron-carbonate vein system contains visible copper minerals (chalcopyrite and bornite), which are locally gold bearing.

Copper grades are locally very high, occurring within discrete chalcopyrite-rich veins up to several centimetres in thickness, related to intense magnetite alteration and later-stage quartz iron carbonate veins. Broad zones of highly anomalous copper (0.1 per cent copper and above) are locally associated with thin quartz vein stockworks and sheeted vein zones with accompanying magnetite and chalcopyrite and lessor pyrite, hosted within potassic altered monzonite and intense magnetite chlorite and minor epidote altered basalt wall rock. Gold values are lower within monzonite hosted mineralization but are locally enriched within larger vein and replacement zones. Mineralization is best developed along the contacts of a swarm of large, dike-like monzonite intrusions, which are separated by lessor mineralized basalts and/or lessor mineralized and altered monzonite bodies. The 2025 IP survey outlined a continuous body of high chargeability beneath the ridge that connects the northern and southern surface showings, suggesting a coalescence of mineralized zones at depth over a strike length of four kilometres.

McLymont/Camp zone rock samples

A total of 54 rock samples were collected from the McLymont area in 2025, including 32 samples from the Camp zone. Rock sampling at the Camp zone returned high-grade gold values from narrow submetre quartz pyrite veins within shear zones of up to 113 g/t gold with 142 g/t silver, highlighting the area as a high-priority target for follow-up exploration. The Camp zone was a focus of early exploration by previous operators, prior to the discovery of the NW zone. This work in the late 1980s included trenching and drilling that returned similar (unverified) gold mineralization but was not followed up as the program shifted to the newly discovered NW zone. Historical drilling at Camp zone was shallow using small diameter core with only visually selected zones being sampled at the time. The Camp zone is interpreted to be structurally controlled and associated with alteration and veining along the McLymont structural corridor and particularly the McGilvary fault. Enduro considers the Camp zone, in conjunction with the broader McLymont area, to represent a compelling high-grade gold opportunity complementary to the company's porphyry copper-gold focus at Andrei.

Other areas of interest

Reconnaissance sampling was also conducted at several other targets across the Newmont Lake project, including Twin, Orange, Burgundy and Chachi. These areas remain prospective for multiple mineral deposit styles and will continue to be evaluated as part of Enduro's systematic, district-scale exploration strategy.

The Twin target, located at the southwestern corner of the property in an area of limited historical exploration, covers a potential seven-kilometre extension of the Bronson trend, a 14-kilometre alignment of porphyry and porphyry-related deposits that extends from the Quartz Rise deposit northwest to the Snip North deposit that was discovered in 2024 by Seabridge Gold. A high-resolution magnetic survey completed over the Twin target indicates clusters of discrete and linear magnetic highs suggesting the presence of intrusive bodies. A small program of rock and soil and silt sampling was completed in the area in 2025 and returned two strings of weakly anomalous copper in soil and a single gold in soil value of 78 parts per billion. This later sample is immediately down slope from a discrete magnetic anomaly. There is limited bedrock exposure in part due to young volcanic flows and ash layers, which may also contribute to the low geochemical soil response.

Qualified person

Robert Cameron, PGeo, Enduro's chief executive officer, is the company's qualified person as defined by National Instrument 43-101 (Standards of Disclosure for Mineral Projects), and has reviewed and approved the technical aspects of this release. Fieldwork was supervised by Stephen Wetherup, PGeo, VPX, for Enduro Metals.

Quality assurance/quality control and data verification

Enduro personnel collected, documented and directly shipped through an independent shipping company all rock, soil and silt samples to Bureau Veritas Laboratories in Vancouver for analyses. At the laboratory, rocks were pulverized, split into smaller aliquots and analyzed by fire assay (code FA330) for Au and 38 elements with a four-acid digestion and 38-element inductively coupled plasma and mass spectrometer process (ICP-MS, code MA250). Overlimit analyses for Au were completed with FA530 process of fire assay lead collection fusion and for Cu by four-acid ICP-MS ore-grade analyses (code MA370).

Soils and silt samples were dried, sieved to smaller size fractions (minus 80 mesh for soils and minus 200 mesh for silts), which utilized an Aqua Regia digestion and finished with a multielement ICP-MS analysis (AQ250) to produce the assays.

Bureau Veritas Laboratories is a certified assay laboratory with ISO 9001 certification that meets TIC Council principles and requirements and is regularly assessed by an external third party. It is accredited by numerous laboratory and government regulatory bodies within Canada and internationally. Enduro has relied upon Bureau Veritas' internal QA/QC processes and reviewed the results from its duplicate, blank and standards analyses.

For details on historical data verification, sample, analytical and testing results, refer to statements posted on the company's website and the technical report titled "Technical Report on the Newmont Lake Property" and written by Maurizio Napoli, PGeo, and Ali Wasiliew, PGeo, dated March 1, 2025. The company treats historical data as valid for exploration purposes only.

About Enduro Metals Corp.

Enduro Metals is an exploration company focused on its Newmont Lake project, a total 688-square-kilometre property located within the heart of British Columbia's Golden Triangle. Building on prior results, Enduro Metals' geological team has outlined multiple deposit environments of interest across the Newmont Lake project including high-grade epithermal/skarn gold along the McLymont fault and copper-gold alkalic porphyry systems at Burgundy and Andrei. The company maintains a broader portfolio of mineral projects across Canada, including the advanced Burn porphyry copper and gold project in Northern British Columbia.

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