Vancouver, British Columbia--(Newsfile Corp. - August 24, 2026) - Enduro Metals Corporation (TSXV: ENDR) ("Enduro", "Enduro Metals" or the "Company") is pleased to announce the completion of its 2026 inaugural drill program at the Andrei copper-gold porphyry target, located within the Company's 100%-owned Newmont Lake Project in British Columbia's Golden Triangle.

Seven diamond drill holes totaling 2,700 metres tested the two principal chargeability anomalies within an open-ended, greater than four-kilometre combined chargeability and magnetic anomaly at Andrei.

Initial geological observations from the program include:

• Hole AD-03 intersected porphyry style alteration and quartz-sulphide veining that increased in abundance downhole. The mineralization and alteration encountered towards the end of the hole are interpreted to represent a peripheral portion of a porphyry system that remains open to the northeast and southeast.

• Hole AD-04 intersected alteration and veining characteristic of a low-sulphidation epithermal system, including an interval of intense vuggy and banded quartz-carbonate-pyrite veining, stockworks and breccias between 63 m and 92 m downhole.

• Hole AD-06 intersected a further interval of low-sulphidation-style quartz-carbonate-sulphide veining and breccias between 436 m and 444 m downhole.

• Phase 2 exploration is underway across the Newmont Lake Project, including a planned 20 line-kilometre IP survey to extend geophysical coverage northeast of the Andrei drilling, together with target-definition work at FK, Southmore, Camp Zone, Burgundy and the 72 Zone.

• All drill core assays are pending and are expected to be received later in the year.

Robert Cameron, Chief Executive Officer of Enduro, commented:

"Completion of our inaugural drill program at Andrei has provided the first subsurface geological information across both of the principal chargeability targets within this extensive geological system. Initial observations indicate that the northeast anomaly is the more prospective. Of particular interest, AD-03 encountered porphyry-style alteration and quartz-sulphide veining that increases in abundance downhole, while AD-04 and AD-06 identified low-sulphidation epithermal-style veining and brecciation in the northeast target area. Our ongoing geological work and upcoming IP survey will provide additional information that, together with the pending assay results, will help us refine our geological model and prioritise the next phase of exploration at Andrei."

Andrei 2026 Drill Program

Enduro's 2026 inaugural drill program at Andrei, as set out in the Company's press release dated June 22, 2026, tested targets within an open-ended 4-kilometre combined chargeability and magnetic anomaly, part of a larger 14 kilometre magnetic-high trend that outlines the larger Andrei trend.

The drill target comprises two principal areas of elevated chargeability. Holes AD-01, AD-02, AD-05 and AD-07 tested the southwest anomaly and holes AD-03, AD-04 and AD-06 tested the northeast anomaly (Figure 2 and Table 1).

The program completed 2,700 m of drilling in seven holes. Fewer metres were completed than initially planned due to locally challenging drilling conditions and limited availability of drill-contractor personnel, which reduced drill productivity during the contracted period. Drill hole summaries are provided below. Intervals reported are core intervals and true widths or dimensions are unknown.

Figure 1: Location Map

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Northeast Anomaly

AD-03 - This drill hole targeted a coincident magnetic high and chargeability high in an area with limited outcrop and was drilled to a depth of 491 m.

The hole intersected a series of fine-grained feldspar porphyry monzonite dykes that cut epidote-chlorite-magnetite altered basalts. The feldspar porphyry monzonite dykes typically contain weakly developed stockwork chlorite-pyrite+/-magnetite veins and quartz-pyrite+/-chalcopyrite+/-molybdenite veins that increase in abundance downhole. The quartz-sulphide veins are commonly haloed by k-feldspar alteration below 183 m down hole.

The porphyry-style mineralization and alteration encountered toward the end of AD-03 are interpreted to represent a peripheral portion of a porphyry system, with alteration and veining increasing at depth. The hole was terminated at 491 m due to drilling conditions.

AD-04 - This hole was collared 335 m north-northwest of AD-03 and 135 m lower in elevation. The hole was designed to test the continuation of a large chargeability high that was also tested by AD-03. It intersected a zone of alteration and veining typical of a low-sulphidation epithermal system within basalts and feldspar porphyry monzonites.

Between 63m and 92m downhole, the hole intersected a zone of intense vuggy and banded quartz-carbonate-pyrite stockworks and breccias with minor chalcopyrite+/-molybdenite veining. The orientation of this zone is currently unknown.

Below 92 m the hole intersected a series of faults and feldspar porphyry monzonite units before faulting ultimately closed the hole off at 192 m.

AD-06 - Hole AD-06 was drilled northward from the same drill pad as hole AD-03 toward hole AD-04, with the objective of avoiding the north-dipping faults encountered in AD-04.

The hole encountered fewer faults and stayed within epidote-chlorite altered basalt with minor monzonite units similar to those observed in hole AD-03.

Between 436 m and 444 m downhole it intersected low-sulphidation style epithermal quartz-carbonate-sulphide veining and brecciation. The hole was lost due to drilling difficulties at a final depth of 507 m.

Southwest Anomaly

AD-01 - The first hole of the 2026 program, AD-01, tested to depth a series of scattered outcrops containing magnetite or hematite veining and stockworks with disseminated chalcopyrite.

The hole intersected feldspar porphyry monzonite units with magnetite veining and trace chalcopyrite in the upper 57 m with alteration and mineralization weakening downhole. It was terminated early at 142 m.

AD-02 - This hole encountered various phases and varieties of monzonite with lesser intervals of basalt. It encountered pervasive moderate chlorite alteration with minor pyrite throughout, as well as local zones of intense potassic alteration characterised by stockwork potassium feldspar veining. The hole ended at its planned depth of 505 m.

AD-05 - AD-05 targeted a large chargeability anomaly. It cored a sequence of basalts and sediments with minor monzonite dykes to 301 m where it cored a large granodiorite body and monzonite dykes. The granodiorite is interpreted to be an older Paleozoic intrusion. The hole was terminated at 505 m.

AD-07 - AD-07 targeted a zone of pyrite stockwork veining and potassic altered monzonite identified on surface. The upper 75 m of this hole intersected chlorite-pyrite-magnetite altered basalt and monzonite with traces of chalcopyrite and molybdenite. Following the intersection of several faults, alteration weakened to the south and at depth. This is interpreted as indicating that either this hole was drilling away from a hydrothermal source or that the mineralized system has been structurally displaced. Hole AD-07 was completed to a final depth of 358 m.

Figure 2: Andrei Target 2026 Drill Plan Plotted on Total Field RTP Magnetics

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Table 1: Drill Collars

Ongoing Exploration

Enduro's 2026 exploration program at Newmont Lake continues including a planned 20 line-kilometre induced polarization survey to extend the existing IP coverage at Andrei to the northeast and extensive mapping and sampling at the Southmore target and the recently acquired FK target northeast of Andrei.

The planned IP survey will extend existing coverage at Andrei northeast of the 2026 drilling, where the encouraging geological observations from AD-03, AD-04 and AD-06 occur near the limit of the 2025 survey. The objective is to better define the extent and geometry of the chargeability response and provide additional vectors for follow up exploration.

Mapping and sampling at Southmore and the recently acquired FK targets will focus on defining the geology, alteration and mineralisation of these targets and identifying priority areas for further geophysical work and potential future drill testing.

Detailed geological work at the historical Camp Zone, located south of McLymont, will follow up the encouraging results from prospecting in 2025, where sampling returned high-grade gold values from narrow sub-metre quartz pyrite veins within shear zones of up to 113 g/t Au with 142 g/t Ag (see news release dated January 8, 2026 for detailed QA/QC). The Camp Zone was the original discovery at Newmont Lake and has not been subject to significant exploration since 1987.

At the Burgundy and 72 Zone copper-gold porphyry system, surface geological work and re-examination of historical drill core will be used to refine Enduro's geological model, improve its understanding of the controls on mineralisation and identify priority areas for future exploration.

About the Newmont Lake Project

The Newmont Lake Project is a large contiguous claim package (688 square km) in the Golden Triangle of Northern British Columbia. It is strategically located near major porphyry copper-gold (Cu-Au) 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). Please see 43-101 Technical Report cited below for further discussion.

The project encompasses five large target areas that include the Andrei porphyry copper-gold target; the partially drill-tested Burgundy Ridge and 72 Zone alkalic-style porphyry copper-gold deposit (331 m @ 0.29% Cu and 0.29 g/t gold in hole 21-001 (see news release dated October 18, 2021 for detailed QA/QC); and the McLymont gold target, a 20 km² area that includes the NW Zone, the focus of historical exploration and drilling, and the Camp Zone where Enduro sampling in 2025 returned high-grade gold values from narrow sub-metre quartz pyrite veins within shear zones of up to 113 g/t Au with 142 g/t Ag (see news release dated January 8, 2026 for detailed QA/QC).

Qualified Person

Robert Cameron, P. Geo, 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 observed the program in person and has reviewed and approved the technical aspects of this release. Site supervision and core logging were under the guidance of Stephen Wetherup, P.Geo., VP Exploration for Enduro Metals. For additional details on Newmont Lake refer to the technical report titled "Technical Report on the Newmont Lake Property" authored by Maurizio Napoli, P.Geo, and Ali Wasiliew, P.Geo. dated March 1, 2025, as posted on Sedar+ and the Company's website and press releases dated October 6, 2025 and January 8, 2026.

About Enduro Metals

Enduro Metals is an exploration company focused on its Newmont Lake Project, a 688 km² 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 Burn porphyry copper and gold project in northern British Columbia.

On Behalf of the Board of Directors of Enduro Metals Corporation

"Robert Cameron"
Chief Executive Officer

www.endurometals.com

Forward-Looking Statements

This news release contains statements that constitute "forward-looking statements". Such forward looking statements involve known and unknown risks, uncertainties and other factors that may cause Enduro's actual results, performance or achievements, or developments in the industry to differ materially from the anticipated results, performance or achievements expressed or implied by such forward-looking statements. Forward-looking statements are statements that are not historical facts and are generally, but not always, identified by the words "expects," "plans," "anticipates," "believes," "intends," "estimates," "projects," "potential" and similar expressions, or that events or conditions "will," "would," "may," "could" or "should" occur.

Although Enduro believes the forward-looking information contained in this news release is reasonable based on information available on the date hereof, forward-looking statements by their nature involve assumptions, known and unknown risks, uncertainties and other factors which may cause our actual results, performance or achievements, or other future events, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements.

THE FORWARD-LOOKING INFORMATION CONTAINED IN THIS NEWS RELEASE REPRESENTS THE EXPECTATIONS OF ENDURO AS OF THE DATE OF THIS NEWS RELEASE AND, ACCORDINGLY, IS SUBJECT TO CHANGE AFTER SUCH DATE. READERS SHOULD NOT PLACE UNDUE IMPORTANCE ON FORWARD-LOOKING INFORMATION AND SHOULD NOT RELY UPON THIS INFORMATION AS OF ANY OTHER DATE. WHILE ENDURO MAY ELECT TO, IT DOES NOT UNDERTAKE TO UPDATE THIS INFORMATION AT ANY PARTICULAR TIME EXCEPT AS REQUIRED IN ACCORDANCE WITH APPLICABLE LAWS.

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