Cloud Peak Energy Announces Results from 2011 Annual Meeting of Stockholders

Following its annual meeting of stockholders today, Cloud Peak Energy
Inc. (NYSE: CLD), the third-largest U.S. coal producer and the only
pure-play Powder River Basin (PRB) coal company, announced that the
company′s stockholders have elected directors William T. Fox III and
James S. Voorhees to its Board of Directors to serve until Cloud Peak
Energy′s 2014 annual meeting.

Cloud Peak Energy also announced that the stockholders:

• 
  ratified the appointment of PricewaterhouseCoopers LLP as the
  company′s independent registered public accounting firm for the 2011
  fiscal year;
  
• 
  approved, on an advisory basis, the compensation of Cloud Peak
  Energy′s named executive officers, as disclosed in the Proxy Statement
  pursuant to the compensation disclosure rules of the Securities and
  Exchange Commission;
  
• 
  approved, on an advisory basis, an advisory say-on-pay vote every year;
  
• 
  approved the amendment to the Cloud Peak Energy Inc. 2009 Long Term
  Incentive Plan to (i) increase the number of shares authorized for
  issuance thereunder and (ii) revise the method by which the number of
  available shares is determined;
  
• 
  re-approved the performance objectives under the Cloud Peak Energy
  Inc. 2009 Long Term Incentive Plan, in accordance with the periodic
  re-approval requirements of Section 162(m) of the Internal Revenue
  Code; and
  
• 
  approved the Cloud Peak Energy Inc. Employee Stock Purchase Plan.
  

Additional information about these proposals can be found in the
company's proxy statement for the annual meeting, which was mailed to
stockholders and filed with the U.S. Securities and Exchange Commission.

The voting results are based on the preliminary report of the company′s
inspector of election. Final results will be included in the company′s
current report on Form 8-K to be filed within four business days of the
annual meeting.

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.

Cloud Peak Energy Inc.

Karla Kimrey, 720-566-2900

Vice
President, Investor Relations