Endeavour Silver’s Terronera Mine Startup Advancing Well, Averaging Over 1,800 Tonnes Per Day in July

Endeavour Silver’s Terronera Mine Startup Advancing Well, Averaging Over

1,800 Tonnes Per Day in July

VANCOUVER, British Columbia, Aug. 05, 2025 -- Endeavour Silver Corp. ("Endeavour" or the "Company") (NYSE:

EXK; TSX: EDR) is pleased to report steady progress at its Terronera mine in Jalisco state, Mexico.

For the month of July, a total of 57,080 tonnes were milled at Terronera, an average of 1,841 tonnes per day (tpd). Since

completing the commissioning phase, throughput has rapidly increased with current milling rates between 1,900 and 2,000 tpd

as adjustments to improve recoveries are ongoing in the grinding and flotation circuits. Since July 16, silver and gold recoveries

have averaged 71% and 67%, respectively, while processing lower grade material.

Higher-grade material is scheduled for processing soon, while optimization efforts continue. The introduction of higher-grade

material is expected to directly enhance recoveries. As higher recoveries are attained, the focus will shift to increasing the

milling rate to sustain the designed throughput of 2,000 tpd.

“We are very pleased with how well startup has progressed,” commented Don Gray, Chief Operating Officer. “Our Terronera

team has really taken ownership with the mill startup and throughput increase, while simultaneously managing the challenges

that arise in the early startup phase. Our focus on implementing our business readiness plan has well-positioned us for

successful operation of Endeavour's next core asset.”

With each phase of the mill ramp-up advancing, Terronera continues to move steadily toward its targeted sustainable

production levels and, ultimately, commercial production.

About Endeavour Silver: Endeavour is a mid-tier precious metals company committed to sustainable and responsible

mining practices. With operations in Mexico and Peru, and the development of the new cornerstone mine in Jalisco State, the

Company aims to contribute positively to the mining industry and the communities in which it operates. In addition, Endeavour

has a portfolio of exploration projects in Mexico, Chile, and the United States, which has helped it achieve its goal of becoming

a premier senior silver producer. 

Qualified Person

Dale Mah, P.Geo., Vice President Corporate Development, a qualified person under NI 43-101, has approved the scientific and

technical information related to operations matters in this news release.

Contact Information

Allison Pettit, Director of Investor Relations

Tel: (604) 640 4804

Email: [email protected]

Website: www.edrsilver.com

Cautionary Note Regarding Forward-Looking Statements

This news release contains "forward-looking statements" within the meaning of the United States Private Securities Litigation

Reform Act of 1995, as amended, and "forward-looking information" within applicable Canadian securities legislation. Such

forward-looking statements and information herein include but are not limited to statements regarding the Company’s plans for

the Terronera Project, the Company’s areas of focus for the Terronera Project, the Terronera Project's forecasted operations,

costs and expenditures, the Company’s future growth and value creation and the timing and results of various related

activities. The Company does not intend to and does not assume any obligation to update forward-looking statements or

information other than as required by applicable law.

Forward-looking statements or information involve known and unknown risks, uncertainties, and other factors that may cause

Endeavor's actual results, level of activity, production levels, performance, or achievements, and its operations to be

materially different from those expressed or implied by such statements. Such factors include but are not limited to

unexpected changes in production and costs guidance; the ongoing effects of inflation and supply chain issues on the

Terronera Project economics; changes in national and local governments’ legislation, taxation, controls, regulations and

political or economic developments in Canada, Chile, the USA and Mexico; financial risks due to precious metals prices;

operating or technical difficulties in mineral exploration, development and mining activities; risks and hazards of mineral

exploration, development and mining (including, but not limited to, environmental hazards, industrial accidents, unusual or

unexpected geological conditions, pressures, cave-ins and flooding); adequate insurance, or inability to obtain insurance;

availability of and costs associated with mining inputs and labour; the speculative nature of mineral exploration and

development; risks in obtaining necessary licenses and permits; continued compliance with the project loan debt facility;

fluctuations in the prices of silver and gold; fluctuations in the currency markets (particularly the Chilean sol, Mexican peso,

Chilean peso, Canadian dollar and US dollar); challenges to the Company's title to properties; as well as those factors

described in the section "risk factors" contained in the Company's most recent form 40F/Annual Information Form filed with

the SEC and Canadian securities regulatory authorities.

Forward-looking statements are based on assumptions management believes to be reasonable, including but not limited to

the continued operation of the Company's mining operations, no material adverse change in the market price of commodities,

forecasted Terronera mine economics as of 2025, mining operations will operate and the mining products will be completed

under management's expectations and achieve their stated production outcomes, and such other assumptions and factors as

set out herein. Although the Company has attempted to identify important factors that could cause actual results to differ

materially from those contained in forward-looking statements or information, other factors may cause results to be materially

different from those anticipated, described, estimated, assessed, or intended. There can be no assurance that any forward-

looking statements or information will be accurate, as actual results and future events could differ materially from those

anticipated in such statements or information. Accordingly, readers should not place undue reliance on forward-looking

statements or information.