Excelsior Provides Details on Metallurgical Drill Program

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Sep 15, 2014) - Excelsior Mining Corp. (TSX VENTURE:MIN)(3XS.F)(EXMGF) ("Excelsior" or the "Company") is pleased to announce that a metallurgical drill program has commenced at the Gunnison Copper Project in Arizona.

The program will comprise ten diamond-drill holes totalling 6400 feet of diamond drilling (11,900 feet total). Two diamond drill rigs and one rotary air drill rig for pre-collars will be used to complete this program. Please, see "Budgeted Metallurgy Holes Map" for the metallurgical drill hole locations. The samples collected will be used to conduct extensive metallurgical testing, including column tests, acid consumption tests and rinse tests. The goal of the program will be to further enhance the understanding of the leaching behaviors of the deposit and reduce uncertainties concerning rates, recoveries and costs. Specific areas targeted for investigation will be sweep efficiency, copper recovery rates, acid consumption rates, and rinsing procedures and rates. This data will be used for both the permitting application process and the Feasibility Study.

Commenting on the program, President & CEO, Stephen Twyerould said, "All of the previous metallurgical testing that we have completed, plus all of the historical data, has defined a project with industry-leading robust economics based on low acid consumption and achievable copper recoveries. We will look to mirror past results as we move the metallurgical component of the Gunnison copper project to feasibility-level."

About Excelsior

Excelsior is a mineral exploration and development company that is advancing the Gunnison Copper Project. The Excelsior management team consists of experienced professionals with proven track records of advancing mining projects into production. Further 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, Prefeasibility Study" dated February 14, 2014.

Dr. Stephen Twyerould, Fellow of AUSIMM, President and CEO of Excelsior, and a Qualified Person as defined by NI 43-101, has reviewed and approved the technical information disclosed in this news release.

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

ON BEHALF OF THE EXCELSIOR BOARD

Mark J. Morabito, Executive Chairman

Cautionary Note Regarding Forward-Looking Information

This news release contains "forward-looking information" concerning anticipated developments and events that may occur in the future. Forward-looking information contained in this news release includes, but is not limited to, statements with respect to (i) the details and expected results of the drill program; (ii) the robust economics of the Gunnison Project; (iii) details about acid consumption and copper recoveries; and (iv) the advancement of the Gunnison Project.