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Abbreviations include: gpt: grams per tonne; Au: gold; Ag: silver; m: metre.
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AgEq is calculated using an 85:1 Au:Ag ratio
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Drill holes LL-46, LL-47, LL-54, LL-56, LL-57, LL-64, LL-70, LL-71, LL-73, LL-78, LL-79, LL-80, LL-83, and LL-84 returned no significant results.
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9 drill holes LL-42, LL45, LL-53, LL-58, LL-60, LL-62, LL-65, LL-66 and LL-72 intersected historical working as part of the boundary definition of the La Luz vein.
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Longitudinal Section of La Luz Vein (Overlain on Figure 10-5 NI 43-101 Technical Report May 15, 2023)
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Table 2. Terronera Drill Results
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| Hole | Structure | From | To | Core Length | True Width | Au | Ag | AgEq | |||
| (m) | (m) | (m) | (m) | (gpt) | (gpt) | (gpt) | |||||
| TRU-001 | Terronera | 121.40 | 131.55 | 10.15 | 8.11 | 1.80 | 282 | 435 | |||
| Including | 122.20 | 123.50 | 1.30 | 1.04 | 0.49 | 1290 | 1,332 | ||||
| TRU-002 | Terronera | 125.80 | 132.50 | 6.70 | 5.09 | 2.07 | 80 | 256 | |||
| Including | 131.90 | 132.50 | 0.60 | 0.46 | 3.24 | 197 | 472 | ||||
| TRU-003 | Terronera | 109.20 | 118.60 | 9.40 | 5.32 | 6.30 | 150 | 686 | |||
| Including | 110.20 | 110.80 | 0.60 | 0.34 | 12.70 | 240 | 1,320 | ||||
| TRU-004 | Terronera | 86.40 | 92.40 | 6.00 | 4.42 | 4.05 | 119 | 463 | |||
| Including | 88.80 | 89.90 | 1.10 | 0.81 | 9.29 | 204 | 994 | ||||
| TRU-005 | Terronera | 150.25 | 159.50 | 9.25 | 4.20 | 1.93 | 216 | 380 | |||
| Including | 151.45 | 152.05 | 0.60 | 0.27 | 1.19 | 924 | 1,025 | ||||
| TRU-006 | Terronera | 201.70 | 208.30 | 6.60 | 2.20 | 3.10 | 130 | 393 | |||
| Including | 204.60 | 205.40 | 0.80 | 0.27 | 14.70 | 240 | 1,490 | ||||
| TRU-007 | Terronera | 182.45 | 187.30 | 4.85 | 1.82 | 1.33 | 99 | 211 | |||
| Including | 182.45 | 182.75 | 0.30 | 0.11 | 5.02 | 111 | 538 | ||||
| TRU-008 | Terronera | 156.50 | 161.50 | 5.00 | 2.07 | 5.50 | 156 | 624 | |||
| Including | 159.50 | 160.25 | 0.75 | 0.31 | 14.60 | 353 | 1,594 | ||||
| TRU-009 | Terronera | 147.10 | 155.90 | 8.80 | 4.20 | 3.41 | 89 | 379 | |||
| Including | 147.90 | 148.70 | 0.80 | 0.38 | 13.50 | 320 | 1,468 | ||||
| TRU-010 | Terronera | 208.20 | 211.50 | 3.30 | 0.99 | 0.09 | 14 | 21 | |||
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Abbreviations include: gpt: grams per tonne; Au: gold; Ag: silver; m: metre.
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AgEq is calculated using an 85:1 Au:Ag ratio
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All drill holes in the Terronera vein have been included in the ‘Drill Results’ table.
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Figure 2. Longitudinal Section of Terronera Vein (Overlain on Figure 10-4 NI 43-101 Technical Report May 15, 2023)
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About Endeavour Silver
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Endeavour is a mid-tier silver producer with three operating mines in Mexico and Peru and a robust pipeline of exploration projects across Mexico, Chile, and the United States. With a proven track record of discovery, development, and responsible mining, Endeavour is driving organic growth and creating lasting value on its path to becoming a leading senior silver producer.
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Qualified Person1
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Dale Mah, P.Geo., Vice President Corporate Development, a qualified person under NI 43-101, has approved the scientific and technical information contained in this news release.
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During 2025, the majority of the drill core samples were shipped to ALS Limited in Zacatecas, Mexico for sample preparation and then for analysis at the ALS laboratory in North Vancouver; at the end of 2025, the laboratory was changed to SGS laboratory in Durango, Mexico for sample preparation and analysis. The 2026 campaign has been completely analyzed by SGS laboratory. The ALS Zacatecas, North Vancouver facilities and SGS laboratory are ISO 9001 and/or ISO/IEC 17025 certified.
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A quality control sampling program of reference standards, blanks and duplicates has been instituted to monitor the integrity of all assay results. All samples are split at the local field office and shipped to ALS and/or SGS laboratories, where they are dried, crushed, split and 250-gram pulp samples are prepared for analysis. Gold was assayed by 30-gram fire assay with atomic absorption (“AA”) spectroscopy finish and silver by aqua regia digestion with ICP-AES / ICP-OES finish, over-limits analyses by fire assay and gravimetric finish.
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Contact Information
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Cautionary Note Regarding Forward-Looking Statements
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This news release contains “forward-looking statements” within the meaning of the United States private securities litigation reform act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation. Such forward-looking statements and information herein include but are not limited to statements regarding the Company’s exploration and drilling plans and programs at Terronera, exploration potential at Terronera, the opportunity to grow resources, extend mine life and unlock additional value across the Terronera property, mining at La Luz and related timing, Terronera’s potential to create shareholder value, the opportunity for mineral discovery, the Company’s path to becoming a leading senior silver producer and the timing and results of various activities. The Company does not intend to and does not assume any obligation to update such forward-looking statements or information, other than as required by applicable law.
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