Certification Pursuant to
18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report of Plum Creek Timber Company, Inc. (the “Company”) on Form 10–Q for the period ended June 30, 2004 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Rick R. Holley, as Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

(1) The Report fully complies with the requirements of section 13a or section 15d of the Securities Exchange Act of 1934; 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 2, 2004
 

By: /s/ Rick R. Holley
RICK R. HOLLEY
President and Chief Executive Officer