Endeavour Silver Corp. (TSX: EDR) (NYSE: EXK) is pleased to report positive drill results from its ongoing drill program at the Guanacevi Mine in Durango state, Mexico. Drilling continues along the prolific Santa Cruz vein in two areas (view Santa Cruz Vein longitudinal section), with the objective to convert, expand, and discover new resources.

The 2022 drill program has continued to focus on the El Curso property, establishing lateral and vertical extents of the mineralized zone between the Porvenir Cuatro and Milache mines. The exploration and exploitation rights to the El Curso property were obtained in 2019 from Ocampo Mining S.A. de CV., and have become an integral contributor to the operation. Recently, under the same agreement terms, the Company has tested the northwest extension of the Porvenir Dos orebody with encouraging results from initial drilling.

Highlights from Recent El Curso Drill Results

• 3.50 gpt Au and 1,150 gpt Ag for 1,430 gpt AgEq over a 1.16 m ETW, including 12.80 gpt Au and 4,240 gpt Ag for 5,264 gpt AgEq over 0.24 m (UCM-102)

• 3.54 gpt Au and 1,129 gpt Ag for 1,412 gpt AgEq over a 7.28 m ETW, including 25.40 gpt Au and 7,080 gpt Ag for 9,112 gpt AgEq over 0.43 m (UCM-106)

Highlights from Recent Porvenir Dos Drill Results

• 1.43 gpt Au and 967 gpt Ag for 1,081 gpt AgEq over a 2.43 m ETW, including 3.64 gpt Au and 5,120 gpt Ag for 5,411 gpt AgEq over 0.23 m (APD-03)

• 1.60 gpt Au and 1,460 gpt Ag for 1,589 gpt AgEq over a 1.17 m ETW, including 2.91 gpt Au and 3,340 gpt Ag for 3,573 gpt AgEq over 0.25 m (APD-04)

Abbreviations include: gpt: grams per tonne; Au: gold; Ag: silver; ETW: estimated true width; m: metre; HW: hanging wall. Silver equivalents are calculated at a ratio of 80:1 silver:gold.

“We are encouraged by the drill results at Guanacevi, as we continue to delineate high grades in areas which are proximal to the mill and historic working areas. The results announced today demonstrate both growth and steady improvement of the deposit and mine plan,” stated Dan Dickson, Chief Executive Officer. “Our focus remains on delineating mineralized extensions to mining horizons and resource growth.”

Latest Drill Results

The Guanacevi drill results are summarized in the following tables:

Guanacevi – Santa Cruz Vein – El Curso

Drill holes UCM-108 and UCM-111 returned no significant results

Guanacevi – Santa Cruz Vein – Porvenir Dos

Drill holes APD-01, APD-02, APD-07 and APD-08 returned no significant results

Notes to Tables

1. Silver equivalents are calculated at a ratio of 80:1 silver:gold.
2. All widths are estimated true widths.
3. No capping has been applied but high-grade intervals have been highlighted.

Qualified Person and Quality Assurance/Quality Control – Dale Mah, P.Geo., Vice President, Corporate Development of Endeavour, is the Qualified Person who reviewed and approved the technical information contained in this news release. 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 Labs, where they are dried, crushed, split and 250-gram pulp samples are prepared for analysis. Gold is determined by fire assay with an atomic absorption finish and silver by aqua regia digestion with ICP finish, over-limits by fire assay and gravimetric finish.

About Endeavour Silver

Endeavour is a mid-tier precious metals mining company that operates two high-grade underground silver-gold mines in Mexico. Endeavour is currently advancing the Terronera mine project towards a development decision, pending financing and final permits and exploring its portfolio of exploration and development projects in Mexico, Chile and the United States to facilitate its goal of becoming a premier senior silver producer. Our philosophy of corporate social integrity creates value for all stakeholders.