Exploration Update For El Gallo 1

TORONTO, ON - McEwen Mining Inc. reported drill results that we expect will extend the mine life and improve the gold grade of El Gallo 1 in Mexico. Drilling is ongoing and an updated resource estimate for El Gallo 1 will be released in Q3 2015.

The 2015 exploration budget for Mexico is $5.5 million. The drill assay results are from the most advanced deposits being explored, San Josa del Alamo and Twin Domes. As well, we continue to explore several regional prospects with strong indications of gold and silver.

The San Josa del Alamo deposit is located 15 kilometers north of the El Gallo 1 mine. The deposit outcrops at surface and the mineralization extends to a depth of 190 meters and has a strike length of 800 meters with an average width of five meters.

A small resource estimate was released in August 2013 for San Josa del Alamo that was based on 36 holes. Since then an additional 73 holes have been drilled. An updated resource estimate for San Josa del Alamo is scheduled for Q3 2015 as part of the El Gallo 1 resource estimate update.

Metallurgical testing indicates the mineralization is amenable to heap leaching and can be processed at the El Gallo 1 mine.

Twin Domes is located 17 kilometers northwest of the El Gallo 1 mine. The deposit occurs at surface and extends to 40 meters depth. The current known strike length is 180 meters however a recent step out hole (TDX-053) indicates the potential to extend mineralization 200 meters to the south. Surface geochemistry also suggests the potential for mineralization further to the north.

Mineralization occurs as a series of stacked lenses with an overall width of 30 meters and individual lenses one to five meters in width. It is structurally controlled with sporadic high grades (up to 114 gpt Au). A total of 65 holes have been drilled since the deposit was discovered in 2013. Results for the first 18 holes were announced in 2013. In 2014 and 2015, 47 holes have been drilled at Twin Domes. A follow-up drill program is currently in progress to both infill the deposit for resource estimation purposes as well as possibly expand the known mineralization.

An initial resource estimate for Twin Domes will be included in the El Gallo 1 resource estimate update scheduled for Q3.

Regional prospects with strong indications of gold and silver that are being evaluated are: San Miguel is located three kilometers southeast of the Samaniego pit at El Gallo 1 where mining is underway and one kilometer south of the Lupita pit that will be developed in 2016. The gold-in-soil anomaly currently measures one kilometer by 500 meters. Drilling on this target is planned for later this year; Tule Alto is located five kilometers north of El Gallo 1. Surface rock samples and exploration blast hole drilling have returned moderate to strongly anomalous gold values over an area measuring roughly one square kilometer. Drilling on this target is planned for later this year.