Six Flags Entertainment 10-Q 2007 Q2 Quarterly report

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER,
PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Mark Shapiro, as Chief Executive Officer of Six Flags, Inc. (the “Company”) certify, pursuant to 18 U.S.C. § 1350, as adopted by Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1)the accompanying Form 10-Q report for the period ending June 30, 2007 as filed with the U.S. Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:  August 3, 2007

/s/ Mark Shapiro

Mark Shapiro

President and Chief Executive Officer