Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-60616) of Pinnacle Entertainment, Inc. of our report dated June 18, 2010, relating to the financial statements of the Pinnacle Entertainment, Inc. 401(k) Investment Plan, which appears in this Form 11-K.

/s/ RubinBrown LLP

St. Louis, Missouri
June 18, 2010