PINNACLE ENTERTAINMENT ANNOUNCES GENERAL CONTRACTOR FOR $16 MILLION ALL-SUITE HOTEL RENOVATION IN DOWNTOWN ST. LOUIS

FOR FURTHER INFORMATION
At the Company – (702) 784-7777:

Dan Lee Chairman & CEO

Wade Hundley President

Steve Capp CFO

Chris Plant Lewis Fanger Investor Relations

At The Vandiver Group—(314) 991-4641 ext. 111
Mack A. Bradley, SVP
mbradley@vandivergroup.com

PINNACLE ENTERTAINMENT ANNOUNCES GENERAL CONTRACTOR FOR $16 MILLION
ALL-SUITE HOTEL RENOVATION IN DOWNTOWN ST. LOUIS

The Suites at Lumière Place to Reopen as Part of Lumière Place District

LAS VEGAS, May 29, 2007 – Pinnacle Entertainment, Inc. (NYSE: PNK), announced today the selection of
Legacy Building Group as the general contractor for the renovation of the former Embassy Suites Hotel at
Lumière Place. The $16 million project includes the refurbishment of the nearly 300 guest suites and atrium
lobby, and a new porte cochere. It is expected to be complete in the fourth quarter of 2007.

“We selected Legacy Building Group because of their high standards, ability and commitment to quality work in
St. Louis,” said Daniel R. Lee, Chairman and Chief Executive Officer of Pinnacle Entertainment. “Their team
will be an integral part in giving this property a contemporary ambiance, inside and out. We believe this hotel,
along with the luxury property we are building across Second Street in Lumière Place, will be among the best in
St. Louis. They will give downtown St. Louis two exciting hotel options to draw conventions, tourists, families
and gaming enthusiasts.”

The property temporarily closed for the initial construction work last month. It is expected to reopen in late
2007 as The Suites at Lumière Place.

“Legacy has impressive credentials including extensive renovation work on multiple projects,” said Todd
George, Vice President and General Manager of Lumière Place. “We are confident that Legacy is a great fit to
work with Pinnacle on this high-profile project for St. Louis.”

Todd Weaver, President of Legacy Building Group, said, “Pinnacle is making a significant investment in St.
Louis and we are honored to be a part of that excitement. This will be the first significant renovation work on
the hotel property since it was built more than 20 years ago, and we are up to the challenge.”
A sky bridge will link the renovated property to the second floor of Lumière Place, just above the casino floor.

About Pinnacle Entertainment
Pinnacle Entertainment owns and operates casinos in Nevada, Louisiana, Indiana, Missouri, Argentina and The
Bahamas; owns a hotel in Missouri; and has significant insurance claims related to a hurricane-damaged hotel
and casino complex previously operated in Biloxi, Mississippi. Pinnacle also has two casino development
projects under construction in the St. Louis, Missouri area, which are dependent upon final approval by the
Missouri Gaming Commission. Pinnacle is currently developing the Company's second casino resort in Lake
Charles, Louisiana, to be called Sugarcane Bay; anticipates developing a casino project in Baton Rouge,
Louisiana, subject to various approvals; and is designing a hotel casino resort to be built on its site at the heart of
the famed Boardwalk in Atlantic City, New Jersey.

About Legacy Building Group
Incorporated in 2002, Legacy Building Group is a Minority Business Enterprise (MBE) construction company
that specializes in the design/build market.

All statements included in this press release, other than historical information or statements of historical fact, are
“forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. These forwardlooking
statements, including statements regarding the timing of Pinnacle’s construction projects and expected budgets,
are based on management’s current expectations and are subject to risks, uncertainties and changes in circumstances that
could significantly affect future results. Accordingly, Pinnacle Entertainment cautions that the forward-looking statements
contained herein are qualified by important factors that could cause actual results to differ materially from those reflected
by such statements. Such factors include, but are not limited to: (a) many construction-related factors could prevent the
Company from completing its construction and development projects within budget and on time; (b) the risk that the
Company’s new development projects, proposed expansions to the existing facilities, and other capital intensive projects
could strain the Company's financial resources and the risk that such projects and new developments might not provide for
a sufficient return, if any; and (c) other risks, including those as may be detailed from time to time in Pinnacle
Entertainment’s filings with the Securities and Exchange Commission (“SEC”). For more information on the potential
factors that could affect the Company’s financial results and business, review the Company’s filings with the SEC,
including its Annual Report on Form 10-K, its Quarterly Reports on Form 10-Q and its Current Reports on Form 8-K.
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