Excelsior Mining Corp (EXMGF)

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Excelsior Mining Provides Permitting Update
EPA Confirms End of Public Comment Period for Gunnison Copper Project

March 5th, 2018

Excelsior Mining Corp. (TSX: MIN) (FSE: 3XS) (OTCQX: EXMGF) ("Excelsior" or the “Company”) announces that the United States Environmental Protection Agency (“EPA”) has informed the Company that the public comment period for the Underground Injection Control (“UIC”) permit, for the Gunnison Copper Project, has officially ended. Over the next several weeks, the EPA will review and respond to all comments received; subsequent to the conclusion of this process, the UIC permit would then be issued. The UIC permit is the final permit required prior to starting construction and commencing production.

Stephen Twyerould, the President and CEO, said, "The progression of our permitting efforts has gone much as we expected, and continues to move towards the issuance of our final operating permit, the Federal UIC permit. The Gunnison Copper Project remains on-track to become one of the most environmentally friendly and cost-effective coper producers in the world."

About Excelsior Mining

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 friendly in-situ recovery copper extraction project. The Feasibility Study projected an after-tax NPV of US$ 807 million and an IRR of 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 information contained in this news release.

Additional information about the Gunnison Copper Project can be found in the technical report filed on SEDAR at www.sedar.com entitled: “Gunnison Copper Project, NI 43-101 Technical Report, Feasibility Study” dated effective December 17, 2016.

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

ON BEHALF OF THE EXCELSIOR BOARD

"Stephen Twyerould"
President & CEO