Cloud Peak Energy CEO to Speak at Credit Suisse Steel & Mining Conference

GILLETTE, Wyo.--(BUSINESS WIRE)--Cloud Peak Energy Inc. (NYSE:CLD), the third-largest U.S. coal producer and the only pure-play Powder River Basin (PRB) coal company, today announced that Colin Marshall, Cloud Peak Energy’s President and Chief Executive Officer, will speak at the Credit Suisse Steel & Mining Conference at 8:30 a.m. BST on Wednesday, September 22, 2010 in London, England.

For additional investor information, please visit the investor relations section of the Cloud Peak Energy web site: www.cloudpeakenergy.com/investor-relations

About Cloud Peak Energy™

Cloud Peak Energy Inc. (NYSE:CLD) is headquartered in Wyoming and is the third largest U.S. coal producer and the only pure-play Powder River Basin (PRB) coal company. As one of the safest coal producers in the nation, Cloud Peak Energy specializes in the production of low sulfur, subbituminous coal. The company owns and operates three surface coal mines in the PRB, the lowest cost major coal producing region in the nation. The Antelope and Cordero Rojo mines are located in Wyoming and the Spring Creek Mine is located near Decker, Montana. With approximately 1,500 employees, the company is widely recognized for its exemplary performance in its safety and environmental programs. Cloud Peak Energy is a sustainable fuel supplier for approximately 4 percent of the nation’s electricity.