Vancouver - Capstone Mining Corp. ('Capstone') (TSX: CS) announces the results of an updated Mineral Resource estimate for the Cozamin Mine in Zacatecas, Mexico.

The total Measured & Indicated ('M&I') Resource Estimate tonnes increased by 66%, with an 83% increase to contained copper metal to 949 million pounds and a 71% increase to contained silver metal to 39 million ounces of silver. M&I Resource for Vein 20, the principal zone in the Mala Noche Footwall Zone ('MNFWZ'), increased by 118% to 13,086 kt at 2.35% Cu and 52 g/t Ag. The Company is currently updating Mineral Reserves and an updated technical report is expected in Q3 2020.

HIGHLIGHTS

Brad Mercer, SVP Exploration and Operations said, 'Since the Resource stated in the 2018 Technical Report, our exploration team has drilled 108,000 meters within a budget of US$10 million. This new Resource Estimate has exceeded our expectation to upgrade Vein 20, the principal zone in the MNFWZ, to Indicated Class, previously estimated as Inferred in 2018. We also extended high grades into a previously undrilled area, thus adding unexpected tonnage in a key part of our development plan, and luckily the vein is wider up dip which bodes well for mining costs, dilution control and lower development rates per tonne. We believe there is additional exploration potential and we are making plans to test new step-out targets in H2 2020.'

Darren Pylot, Capstone's President and CEO said, 'These results demonstrate why I have been saying 'the best has yet to come at Cozamin', which is incredible given the mine has generated over US$450 million in cumulative free cash flow since 2007. We are nearly six months away from seeing a new chapter for Cozamin, as copper and silver production expands by at least 50% to over 50 million pounds of copper and 1.5 million ounces of silver per year, respectively.'

ABOUT CAPSTONE MINING CORP.

Capstone Mining Corp. is a Canadian base metals mining company, focused on copper. Our two producing mines are the Pinto Valley copper mine located in Arizona, US and the Cozamin copper-silver mine in Zacatecas State, Mexico. In addition, Capstone has the large scale 70% owned copper-iron Santo Domingo development project in Region III, Chile, in partnership with Korea Resources Corporation, as well as a portfolio of exploration properties. Capstone's strategy is to focus on the optimization of operations and assets in politically stable, mining-friendly regions, centred in the Americas. We are committed to the responsible development of our assets and the environments in which we operate. Our headquarters are in Vancouver, Canada and we are listed on the Toronto Stock Exchange (TSX).

CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION

This news release, and the documents incorporated by reference herein, contains 'forward-looking information' within the meaning of Canadian securities legislation and 'forward-looking statements' within the meaning of the United States Private Securities Litigation Reform Act of 1995 (collectively, 'forward-looking statements'). These forward-looking statements are made as of the date of this document and Capstone Mining Corp. ('Capstone' or the 'Company') does not intend, and does not assume any obligation, to update these forward-looking statements, except as required under applicable securities legislation. Forward-looking statements relate to future events or future performance and reflect our expectations or beliefs regarding future events. Forward-looking statements include, but are not limited to, statements with respect to the continuing success of mineral exploration, Capstone's ability to fund future exploration activities, the estimation of mineral resources and mineral reserves, the realization of mineral reserve estimates, the timing and amount of estimated future production, costs of production and capital expenditures, the success of our mining operations, the estimations for potential quantities and grade of inferred resources and exploration targets, environmental risks, unanticipated reclamation expenses and title disputes. In certain cases, forward-looking statements can be identified by the use of words such as 'plans', 'expects', 'aiming', 'approximately', 'guidance', 'scheduled', 'target', 'estimates', 'forecasts', 'extends', 'convert', 'potential', 'intends', 'anticipates', 'believes' or variations of such words and phrases, or statements that certain actions, events or results 'may', 'could', 'should', 'would', 'will', 'might' or 'will be taken', 'occur' or 'be achieved' or the negative of these terms or comparable terminology. By their very nature, forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Such factors include, amongst others, risks related to inherent hazards associated with mining operations and closure of mining projects, the inherent uncertainty of mineral exploration and estimations of exploration targets, potential delays in exploration due to COVID-19 or governmental action, future prices of copper and other metals, compliance with financial covenants, surety bonding, our ability to raise capital or fund explorations, Capstone's ability to acquire properties for growth, counterparty risks associated with sales of our metals, foreign currency exchange rate fluctuations, changes in general economic conditions, accuracy of mineral resource and mineral reserve estimates, operating in foreign jurisdictions with risk of changes to governmental regulation, compliance with governmental regulations, compliance with environmental laws and regulations, reliance on approvals, licences and permits from governmental authorities, impact of climatic conditions on our operations, aboriginal title claims and rights to consultation and accommodation, land reclamation and mine closure obligations, uncertainties and risks related to the potential development of the Cozamin project, increased operating and capital costs, challenges to title to our mineral properties, maintaining ongoing social license to operate, dependence on key management personnel, potential conflicts of interest involving our directors and officers, corruption and bribery, limitations inherent in our insurance coverage, labour relations, increasing energy prices, competition in the mining industry, risks associated with joint venture partners, our ability to integrate new acquisitions into our operations, cybersecurity threats, legal proceedings, and other risks of the mining industry as well as those factors detailed from time to time in the Company's interim and annual financial statements and MD&A of those statements, all of which are filed and available for review under the Company's profile on SEDAR at www.sedar.com. Although the Company has attempted to identify important factors that could cause our actual results, performance or achievements to differ materially from those described in our forward-looking statements, there may be other factors that cause our results, performance or achievements not to be as anticipated, estimated or intended. There can be no assurance that our forward-looking statements will prove to be accurate, as our actual results, performance or achievements could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on our forward-looking statements.

Contact:

Jerrold Annett

Tel: 416-572-2272

Email: jannett@capstonemining.com

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