FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * MARSHALL COLIN   2. Issuer Name and Ticker or Trading Symbol CLOUD PEAK ENERGY INC. [CLD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President & CEO (Last) (First) (Middle) 505 S. GILLETTE AVE. 3. Date of Earliest Transaction (Month/Day/Year) 03/08/2011 (Street) GILLETTE, WY 82716 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/08/2011(1)   A   25,011 A $ 0 220,211 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Non-Qualified Stock Option (Right to Buy)

$ 20.99

03/08/2011

A

42,101

(2)

(3)

Common Stock

42,101

$ 0

42,101

D

Performance Units

(4)

03/08/2011

A

50,023

(4)

(4)

Common Stock

50,023

$ 0

50,023

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MARSHALL COLIN 505 S. GILLETTE AVE. GILLETTE, WY 82716	X		President & CEO

Signatures

/s/ Amy J. Stefonick, attorney-in-fact for Colin Marshall		03/10/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Restricted Stock Award which vests as to 100% three years after the date of grant.
(2)	100% of the option vests three years after the date of grant.
(3)	Nonqualified options granted under Cloud Peak Energy Inc.'s 2009 Long Term Incentive Plan expire ten years after the date of grant.
(4)	Each performance right represents a contingent right to receive one share of Cloud Peak Energy Inc. common stock. The performance rights vest 3 years from the date of grant upon Cloud Peak Energy's achievement of Performance Goals, which are based upon Cloud Peak Energy's relative total shareholder return. These achievements may result in a payout range between 0% and 200% of the target. The number of performance rights shown in columns 5 and 7 is equal to the target number of performance rights that may be earned. There is no expiration date for performance rights.

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