UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                       Pursuant to Section 13 OR 15(d) of
                       The Securities Exchange Act of 1934


      Date of Report (Date of earliest event reported): October 6, 2005


                               CALPINE CORPORATION
             (Exact name of registrant as specified in its charter)

                                    Delaware
                 (State or other jurisdiction of incorporation)

                        Commission File Number: 001-12079

                 I.R.S. Employer Identification No.: 77-0212977

                           50 West San Fernando Street
                           San Jose, California 95113
                            Telephone: (408) 995-5115
         (Address of principal executive offices and telephone number)

     Check the  appropriate  box below if the Form 8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

     [ ]  Written communications pursuant to Rule 425 under the Securities Act
          (17 CFR 230.425)

     [ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
          (17 CFR 240.14a-12)

     [ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
          Exchange Act (17 CFR 240.14d-2(b))

     [ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
          Exchange Act (17 CFR 240.13e-4(c))





ITEM 2.05 -- COSTS ASSOCIATED WITH EXIT OR DISPOSAL ACTIVITIES

     The disclosure in Item 8.01 below relating to the estimated loss on sale of
the Ontelaunee  Energy Center  ("Ontelaunee"),  which Calpine  Corporation  (the
"Company") expects to recognize in the third quarter of 2005, is incorporated by
reference  herein.  This updates our previous  estimate of the expected  loss as
reported on Form 8-K filed August 22, 2005.


ITEM 2.06 -- MATERIAL IMPAIRMENTS

     The disclosure in Item 8.01 below relating to the expected loss on the sale
of  Ontelaunee  that the Company  expects to recognize  in the third  quarter of
2005, is incorporated by reference herein.


ITEM 8.01 -- OTHER EVENTS

     On October 7, 2005, the Company issued the press release attached hereto as
Exhibit 99.1.  Subsequent to issuing this press release, the Company has refined
its estimated loss from the sale of Ontelaunee from  approximately $129 million,
as disclosed in the press release, to approximately  $137.2 million.  The change
is primarily  associated  with greater  operating  margin recorded by Ontelaunee
than previously  forecasted  since July 1, 2005, the effective date of the sale.
Under the terms of the sales agreement, Ontelaunee's operating margin subsequent
to June 30, 2005, creates a downward adjustment in the purchase price.  However,
the increased  loss on sale is offset by the  favorable  impact of the increased
operating  margin,  thus resulting in no change to net income from  discontinued
operations.


ITEM 9.01 -- FINANCIAL STATEMENTS AND EXHIBITS

(a)  Financial Statements of Businesses Acquired.

     Not  Applicable

(b)  Pro Forma Financial Information.

     Not Applicable

(c)  Exhibits.

     99.1 Press Release dated October 7, 2005







                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                  CALPINE CORPORATION

                                  By:  /s/ Charles B. Clark, Jr.
                                       ------------------------------------
                                       Charles B. Clark, Jr.
                                       Senior Vice President, Controller and
                                       Chief Accounting Officer


Date: October 13, 2005







                                  EXHIBIT INDEX




               Exhibit               Description
               -------   -----------------------------------
               99.1      Press release dated October 7, 2005


================================================================================


EXHIBIT 99.1


NEWS RELEASE                                            CONTACTS: (408) 995-5115
                                   Media Relations:  Katherine Potter, Ext. 1168
                                    Investor Relations:  Karen Bunton, Ext. 1121


       Calpine Completes Sale of Ontelaunee Energy Center for $225 Million


     (SAN  JOSE,  Calif.)  /PR  Newswire - First  Call/  Oct.  7, 2005 - Calpine
Corporation  [NYSE:CPN]  has completed the sale of its  550-megawatt  Ontelaunee
Energy  Center to LS Power  Equity  Partners (LS Power) for $225  million,  less
transaction  costs.  The  previously  announced  asset sale is part of Calpine's
strategic  initiative  to reduce debt and  optimize  its power plant  portfolio.
Since launching its strategic initiative in May 2005, Calpine has completed more
than $2 billion of asset sales.

     The Ontelaunee  sale is the third of four planned power plant sales,  which
the company  announced in June 2005.  Net proceeds  from the sale of  Ontelaunee
will be used in accordance with the company's indentures. The company expects to
record a non-cash loss on the sale of Ontelaunee of  approximately  $129 million
in the quarter ended September 30, 2005.

     "The Ontelaunee sale provides Calpine with the resources to concentrate our
activities in Calpine's core markets to further optimize our power  operations,"
stated Calpine  Executive Vice President and Chief Financial  Officer Bob Kelly.
"The sale also  provides  Calpine  with the  opportunity  to expand  our  energy
services  business,  providing LS Power a broad range of  operational  and power
services for Ontelaunee."

     Calpine  will  continue to operate the plant on behalf of LS Power for five
years, and provide turbine maintenance and parts services for ten years. Calpine
Energy Services,  the trading and risk management  subsidiary for Calpine,  will
supply a variety of energy services,  including power marketing and coordination
of power and fuel scheduling, for a six-month term.

     The Ontelaunee Energy Center is a natural gas-fired,  combined-cycle  power
plant located in Ontelaunee  Township,  Pa. The plant entered operations in 2002
and generates electricity for the Pennsylvania-New Jersey-Maryland power market.

About Calpine

     A  major  power  company,   Calpine  Corporation   supplies  customers  and
communities  with  electricity  from clean,  efficient,  natural  gas-fired  and
geothermal power plants. Calpine owns, leases and operates integrated systems of
plants in 21 U.S. states and three Canadian  provinces,  and is building a plant
in Mexico.  Its customized  products and services  include  wholesale and retail
electricity,   natural  gas,  gas  turbine   components  and  services,   energy
management,  and a wide  range  of power  plant  engineering,  construction  and
operations services.  Calpine was founded in 1984. It is included in the S&P 500
Index and is  publicly  traded on the New York Stock  Exchange  under the symbol
CPN. For more information, visit www.calpine.com.

     This  news  release  discusses  certain  matters  that  may  be  considered
"forward-looking" statements within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as  amended,  including  statements  regarding  the  intent,  belief or  current
expectations  of  Calpine   Corporation  ("the  Company")  and  its  management.
Prospective investors are cautioned that any such forward-looking statements are
not  guarantees  of  future  performance  and  involve  a number  of  risks  and
uncertainties  that could  materially  affect  actual  results  such as, but not
limited to, (i) the timing and extent of  deregulation of energy markets and the
rules and regulations adopted on a transitional basis with respect thereto; (ii)
the timing and extent of changes in  commodity  prices for energy,  particularly
natural gas and electricity; (iii) unscheduled outages of operating plants; (iv)
a competitor's  development of lower cost generating gas-fired power plants; (v)
risks  associated  with  marketing  and selling  power from power  plants in the
newly-competitive   energy  market;   and  (vi)  other  risks   identified  from
time-to-time in the Company's reports and registration statements filed with the
SEC, including the risk factors identified in its Annual Report on Form 10-K for
the year ended December 31, 2004,  and in its Quarterly  Report on Form 10-Q for
the three  months  ended  June 30,  2005,  which  can be found on the  Company's
website at www.calpine.com. All information set forth in this news release is as
of today's date, and the Company undertakes no duty to update this information.