Cloud Peak Energy Inc. Announces Schedule for Third Quarter and First Nine Months of 2017 Results

GILLETTE, Wyo.–(BUSINESS WIRE)–Cloud Peak Energy Inc. (NYSE:CLD), one of the largest U.S. coal
producers and the only pure-play Powder River Basin (“PRB”) coal
company, plans to announce its third quarter and first nine months 2017
financial results on October 26, 2017, after the markets close.

A conference call with management is scheduled at 5:00 p.m. ET on
October 26, 2017 to review the results and current business conditions.
The call will be webcast live over the Internet from www.cloudpeakenergy.com
under “Investor Relations.” Participants should follow the instructions
provided on the website for downloading and installing the audio
applications necessary to join the webcast. Interested individuals also
can access the live conference call via telephone at (855) 793-3260
(domestic) or (631) 485-4929 (international) and entering pass code
80554310.

Following the live webcast, a replay will be available at the same URL
on the website for seven days. A telephonic replay will also be
available approximately two hours after the call and can be accessed by
dialing (855) 859-2056 (domestic) or (404) 537-3406 (international) and
entering pass code 80554310. The telephonic replay will be available for
seven days.

About Cloud Peak Energy®

Cloud Peak Energy Inc. (NYSE:CLD) is headquartered in Wyoming and is one
of the largest U.S. coal producers and the only pure-play Powder River
Basin coal company. As one of the safest coal producers in the nation,
Cloud Peak Energy mines low sulfur, subbituminous coal and provides
logistics supply services. 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 in Montana. In 2016, Cloud Peak
Energy shipped approximately 59 million tons from its three mines to
customers located throughout the U.S. and around the world. Cloud Peak
Energy also owns rights to substantial undeveloped coal and
complementary surface assets in the Northern PRB, further building the
Company’s long-term position to serve Asian export and domestic
customers. With approximately 1,300 total 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 three percent of the nation’s electricity.

Contacts

Cloud Peak Energy Inc.
Lorri Owen, 720-566-2932
Investor
Relations