Tkp 45 201 111 2008 02250

by

Item 7.01              Regulation FD Disclosure. On February 27, 2013, Cloud Peak Energy Inc.

Posted investor slides, dated February, 2013, on the Investor Relations section of www.cloudpeakenergy.com.  These slides are furnished as Exhibit 99.1 to this Form 8-K and incorporated herein by reference.  The Cloud Peak Energy website is not intended to function as a hyperlink, and the information contained on such website is not a part of this Form 8-K. Item 9.01              Financial Statements and Exhibits   (d) Exhibits. The following exhibit is being furnished herewith.

99.1     Furnished February 2013 Investor Slides   2. 1 Cloud Peak Energy Inc. Financial Data Cloud Peak Energy Inc.

'Peltigera malacea cyanobiont' DB3992] #=GS WP_106922372.1/19-111 DE. DE [subseq from] hypothetical protein EN45_073510 [Penicillium chrysogenum] #=GS. [Rhodobacteraceae bacterium TMED111] #=GS EWM30619.1/99-201 DE. TKP] AOE66655.1 pyridoxamine 5'-phosphate oxidase [Pseudomonas. TS45] KVK66325.1 hypothetical protein L907_22115 [Agrobacterium sp. #=GS WP_055400096.1/4-201 DE [subseq from] DUF3800 domain-containing protein. PRL28878.1 hypothetical protein BV111_00265 [Haemophilus influenzae]. TKP] SDY02845.1 Protein of unknown function [Pseudomonas sp.

Is the sole owner of Cloud Peak Energy Resources LLC. Unless expressly stated otherwise in this presentation, all financial data included herein is consolidated financial data of Cloud Peak Energy Inc. Cautionary Note Regarding Forward-Looking Statements This presentation 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, beliefs, assumptions and estimates regarding our company, industry, economic conditions, government regulations, energy policies and other factors. These statements are subject to significant risks, uncertainties and assumptions that are difficult to predict and could cause actual results to differ materially and adversely from those expressed or implied in the forward-looking statements. For a description of some of the risks and uncertainties that may 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, including those in Item 1A 'Risk Factors' of 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. Iron maiden best of the beast rare. 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 our presentation, whether as a result of new information, future events or otherwise, except as required by law. Non-GAAP Financial Measures This presentation includes the non-GAAP financial measures of (1) Adjusted EBITDA (on a consolidated basis and for our reporting segments) and (2) Adjusted Earnings Per Share (“Adjusted EPS”).