Western Sierra Confirms It Has Completed Initial Modifications at the Gold Basin Mine

Western Sierra Mining Corp., (OTC:WSRA) confirmed today that it is has recently completed the initial reconstruction of the Gold Basin Mine in the Prescott Mountains of Arizona. The project is part of a long term development agreement to open up the entire 350 acres of the placer property.

The now completed work was done over a period of four months and included a complete redesign of the material flow in and around the facility, significant enlargement of the older recycling ponds, road improvements, added technology and extraction equipment for both the initial processing, final extraction and clean up prior to being readied for smelting.

Approximately $2.6 million in operating equipment is now on site and in excess of $300,000 in infrastructure improvements.

The new plant is designed to process 50 yards of ore grade gravels per hour. Estimated grades will run between .35 to 1.1 grams Au per yard. Initial start up will begin during the week of July 21st, 2013 with individual systems testing and minor planned plant modifications to follow shortly thereafter. The new facility is planned for startup operation in early August and reaching full production during the 3rd quarter of 2013.

This initial program is planned as the small scale systems test in preparation for the larger development program including the expansion of the current facility to 250 yards per hour with some modifications to its existing permits.  Expansion construction is being scheduled for mid 2014.

About Western Sierra Mining Corp

Western Sierra Mining is an aggressive gold and silver exploration and mining company focused on the historic mining districts of the Bradshaw Mountains of Arizona with additional areas of interest in Nevada and Mexico.

Statement Concerning Forward-Looking Information

Certain information set forth herein contains "forward-looking statements" within the meaning of the federal securities laws.  The word "estimates," "expects," "anticipates," "forecast," "plans," "intends," "believes" and variations of such words or similar expressions are intended to identify forward-looking statements. 

The Company's expectations, beliefs and projections are expressed in good faith and are believed by the Company to have a reasonable basis but there can be no assurances that management's expectations, beliefs, and projections will be achieved or accomplished. 

CONTACT: Mr. Michael Chaffee   928-680-5513
         Mr. Dennis Atkins     405-330-8395