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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 V3ygD40gmchWl+Rg2SGKnQ==

<SEC-DOCUMENT>0000891618-03-001058.txt : 20030227
<SEC-HEADER>0000891618-03-001058.hdr.sgml : 20030227
<ACCEPTANCE-DATETIME>20030227112511
ACCESSION NUMBER:		0000891618-03-001058
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20030227

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CALPINE CORP
		CENTRAL INDEX KEY:			0000916457
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				770212977
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-85654
		FILM NUMBER:		03582299

	BUSINESS ADDRESS:	
		STREET 1:		50 WEST SAN FERNANDO ST
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95113
		BUSINESS PHONE:		4089955115

	MAIL ADDRESS:	
		STREET 1:		50 W SAN FERNANDO
		STREET 2:		SUITE 500
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95113
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>f88093b3e424b3.txt
<DESCRIPTION>424B3
<TEXT>
<PAGE>

                                                Filed Pursuant to Rule 424(b)(3)
                                                      Registration No. 333-85654

         PROSPECTUS SUPPLEMENT NO. 13 TO PROSPECTUS DATED JUNE 21, 2002

                                       OF

                              CALPINE CORPORATION

                                  RELATING TO
                       RESALES BY SELLING SECURITYHOLDERS
                                       OF
                          4% CONVERTIBLE SENIOR NOTES
    AND SHARES OF COMMON STOCK ISSUABLE UPON CONVERSION OF THE SENIOR NOTES

     This Prospectus Supplement supplements the Prospectus dated June 21, 2002,
as supplemented to date (the "Prospectus"). This Prospectus Supplement should be
read in conjunction with the Prospectus, which is to be delivered by selling
securityholders to prospective purchasers along with this Prospectus Supplement.
The information in the following table supercedes in part and supplements the
information in the relevant section in the Prospectus.

<Table>
<Caption>
                                                                                                SHARES OF
                                                                                                  COMMON
                                     AGGREGATE PRINCIPAL       SHARES OF        SHARES OF   STOCK BENEFICIALLY
                                       AMOUNT OF NOTES           COMMON          COMMON           OWNED
                                        BENEFICIALLY             STOCK            STOCK      AFTER COMPLETION
SELLING HOLDER                        OWNED AND OFFERED    BENEFICIALLY OWNED    OFFERED     OF THE OFFERING
- --------------                       -------------------   ------------------   ---------   ------------------
<S>                                  <C>                   <C>                  <C>         <C>
Millennium Strategic Convergence
  Fund, L.P. ......................       $500,000               27,670          27,670             0
</Table>

                             ---------------------

                 Prospectus Supplement dated February 27, 2002

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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