Cloud Peak Energy Agrees to Terms for Terminal Capacity

Cloud Peak Energy Inc. (NYSE:CLD), today announced it has agreed with
Westshore Terminals Limited Partnership ('Westshore?) on terms for the
shipment of coal through the Westshore Terminal in Vancouver BC for a
period of ten years, which will commence in 2013 when the current
contract ends. A definitive agreement embodying these terms will be
concluded by the parties. The commercial terms are confidential.

Cloud Peak Energy exported approximately 3.3 million tons to Asian
customers in 2010 through the Westshore Terminal.

About Cloud Peak Energy ^®

Cloud Peak Energy Inc. (NYSE:CLD) is headquartered in Wyoming and
is one of the 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.

Cautionary Note Regarding Forward-Looking Statements

This release contains 'forward-looking statements' within the meaning of
the safe harbor provisions of Section 27A of the Securities Act of 1933
and Section 21E of the Securities Exchange Act of 1934. Forward-looking
statements are not statements of historical facts and often contain
words such as 'may,' 'will,' 'expect,' 'believe,' 'anticipate,' 'plan,'
'estimate,' 'seek,' 'could,' 'should,' 'intend,' 'potential,' or words
of similar meaning. Forward-looking statements are based on management's
current expectations or beliefs, including our expectations for exports
of coal, as well as assumptions and estimates regarding our company,
industry, economic conditions, government regulations and energy
policies and other factors. Forward-looking statements may include
statements regarding our plans, strategies, prospects and expectations
concerning our business, operating results, financial condition and
other matters that do not relate strictly to historical facts. These
statements are subject to significant risks, uncertainties, and
assumptions that are difficult to predict and could cause actual results
to differ materially from those expressed or implied in the
forward-looking statements. For a discussion of some of the factors that
could adversely affect our future results, refer to the risk factors
described from time to time in the reports and registration statements
we file with the Securities and Exchange Commission ('SEC'), including
those in Item 1A - Risk Factors in our most recent Form 10-K and any
updates thereto in our Forms 10-Q and current reports on Forms 8-K.
There may be other risks and uncertainties that are not currently known
to us or that we currently believe are not material. We make
forward-looking statements based on currently available information, and
we assume no obligation to, and expressly disclaim any obligation to,
update or revise publicly any forward-looking statements made in this
release, whether as a result of new information, future events or
otherwise, except as required by law.

Cloud Peak Energy Inc.

Karla Kimrey, 720-566-2900

Vice
President, Investor Relations