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Excelsior Mining Welcomes Stephen Axcell to the Board of Directors

Management Changes

NEWS RELEASE

Excelsior Mining Welcomes Stephen Axcell to the Board of Directors

August 21, 2018

Excelsior Mining Corp. (TSX: MIN) (OTCQX: EXMGF) (Frankfurt: 3X S) ("Excelsior" or the

“Company”) is pleased to announce that Mr. Stephen Axcell has joined the Board of Directors. The

new appointment is in keeping with Excelsior’s continuing effor t to add additional team members with

production experience as the Gunnison Copper Project targets co mmercial production in 2019. Mr.

Axcell will also join the Company’s Project Steering Committee.

Mr. Axcell is an executive leader with 38 years of experience w ith strengths in mining operations

management and project management execution, including process plant design and construction

management; with industry expertise in mining and minerals, pharmaceutical, and hydrocarbon projects.

He has vast experience in international design and construction projects. Experience includes

management and oversight of large and small projects, complex p rocess facilities in both green-fields

and retro-fit (brown fields) environments.

Mr. Axcell is currently an Independent Consultant providing ser vices to the Mining Industry and large

capital projects with an emphasis on achieving project delivery excellence. He was until recently a

Senior Vice President for Jacobs Engineering Group. At Jacobs h is role included operational

responsibilities for the Americas Mining and Minerals group and latterly the Asia Pacific region. The role

included resourcing all projects, striving for ‘flawless’ project execution and growing the business. Prior

to rejoining Jacobs, Stephen worked for the largest diamond min ing company in the world by value,

initially charged with managing and executing a large multi-bil lion-dollar capital project portfolio and

subsequently as Deputy Managing Director responsible for all th e technical functions within the

company. Mr. Axcell holds a BSc (Eng) Minerals Processing from the University of the Witwatersrand,

South Africa.

Mark J. Morabito, Chair of the Board of the Company states “I a m pleased to welcome Steve Axcell to

the Board of Excelsior. His vast array of experience in project management, process plant design, and

construction management will bring valuable input to the team and we look forward to his contributions

as our world class management team drives the Company forward to production targeted for 2019.”

About Excelsior

Excelsior Mining “The Copper Solution Company ” is a mineral exploration and development company

that is advancing the Gunnison Copper Project in Cochise County, Arizona. The project is an advanced

staged, low cost, environmentally f riendly in-situ recovery cop per extraction project. The Feasibility

Study projected an after-tax NPV of US$807 million and an IRR o f 40% using a US$2.75 per pound

copper price and a 7.5% discount rate.

Excelsior’s technical work on the Gunnison Copper Project is supervised by Stephen Twyerould, Fellow

of AUSIMM, President & CEO of Excelsior and a Qualified Person as defined by National Instrument

43-101. Mr. Twyerould has reviewed and approved the technical i nformation contained in this news

release.

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Further information about the Gunnison Copper Project can be fo und in the technical report filed on

SEDAR at www.sedar.com entitled: “Gunnison Copper Project, NI 4 3-101 Technical Report,

Prefeasibility Study Update” dated effective January 28, 2016.

For more information on Excelsior, please visit our website at www.excelsiormining.com.

ON BEHALF OF THE EXCELSIOR BOARD

"Stephen Twyerould"

President & CEO

For further information regarding this press release please contact:

Excelsior Mining Corp.

JJ Jennex, Vice President, Corporate Affairs

T: 604-681-8030 x240

E: [email protected]

www.excelsiormining.com

Cautionary Note Regarding Forward-Looking Information

This news release contains "for ward-looking information" conc erning anticipated developments and events that may occur in the f uture.

Forward looking information contained in this news release incl udes, but is not limited to, statements with respect to: (i) the timeline for

commercial production from the Gunnison Project; (ii) the results of the Feasibility Study; and (iii) the ability to mine the Gunnison Project using

in-situ recovery mining techniques.

In certain cases, forward-looking information can be identified by the use of words such as "plans", "expects" or "does not expect", "is expected",

"budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "believes", or variations of such words and

phrases or state that certain actions, ev ents or results "may", "could", "would", "might" or "will be taken", "occur" or "be ac hieved" suggesting

future outcomes, or other expectations, be liefs, plans, objectives, assumptions, intentions or statements about future events o r performance.

Forward-looking information contained in th is news release is based on certain factor s and assumptions regarding, among other t hings, the

estimation of mineral resources and mineral reserves, the realizat ion of resource and reserve estimates, copper and other metal prices, the

timing and amount of future exploration and development expenditures, the estimation of initial and sustaining capital requirem ents, the

estimation of labour and operating costs, the availability of necessary financing and materials to continue to explore and develop the Gunnison

Project in the short and long-term, the progress of exploration and development activities, the receipt of necessary regulatory approvals, the

completion of the permitting process (including the resolution of any filed appeals), the estimation of insurance coverage, and assumptions

with respect to currency fluctuations, env ironmental risks, title disputes or claims, and other similar matters. While the Comp any considers

these assumptions to be reasonable based on information currently available to it, they may prove to be incorrect.

Forward looking information involves know n and unknown risks, uncertainties and other fa ctors which may cause the actual result s,

performance or achievements of the Company to be materially different from any future results, performance or achievements expr essed or

implied by the forward-looking information. Such factors include risks inherent in the exploration and development of mineral deposits, including

risks relating to changes in project paramet ers as plans continue to be redefined in cluding the possibility that mining operati ons may not

commence at the Gunnison Project, risks relating to variations in mineral resources and reserves, grade or recovery rates resulting from current

exploration and development activi ties, risks relating to the ability to access in frastructure, risks relating to changes in co pper and other

commodity prices and the worldwide demand for and supply of copper and related products, risks related to increased competition in the

market for copper and related products and in the mining indus try generally, risks related to current global financial conditio ns, uncertainties

inherent in the estimation of mineral resources, access and supply risks, reliance on key personnel, operational risks inherent in the conduct

of mining activities, including the risk of accidents, labour disputes, increases in capital and operating costs and the risk of delays or increased

costs that might be encountered during the development process, regulatory risks, including risks relating to the acquisition o f the necessary

licenses and permits, financing, c apitalization and liquidity risks, including the risk that the financing necessary to fund th e exploration and

development activities at the Gunnison Project may not be available on satisfactory terms, or at all, risks related to disputes concerning property

titles and interest, environmental risks and the additional risks identified in the “Risk Factors” section of the Company’s reports and filings with

applicable Canadian securities regulators.

Although the Company has attempted to identify important factors t hat could cause actual actions, events or results to differ m aterially from

those described in forward-looking information, there may be other factors that cause actions, even ts or results not to be as a nticipated,

estimated or intended. Accordingly, readers should not place undue reliance on forward-l ooking information. The forward-looking information

is made as of the date of this news release. Except as required by applicable securities laws, the Company does not undertake any obligation

to publicly update or revise any forward-looking information.