November 3, 2008

Ecopetrol Announces Timing for 3rd Quarter 2008 Earnings Release and Conference Call

BOGOTA, Colombia, Nov. 3 /PRNewswire-FirstCall/ -- Ecopetrol (BVC: ECOPETL and NYSE: EC), Colombia's largest enterprise and only vertically integrated crude oil and natural gas company, will release its third quarter 2008 results before the markets open on Monday, November 10, 2008. The press release will be available immediately on the Company's website at http://www.ecopetrol.com.co/. Ecopetrol's senior management will conduct two conference calls with Q & A to discuss third quarter results.

   Webcasts   Spanish                                English   November 10, 2008                      November 10, 2008   8:00 a.m. ET (Bogota/New York)         10:00 a.m. ET (Bogota/New York)    

The live broadcast of the conference calls and slide presentations will be available on Ecopetrol's website: http://www.ecopetrol.com.co/. Additionally, on the webcast registration screen, the presentation may be downloaded or printed. The webcast archive will be available for one year.

   Contact:    Investor Relations Officer   Claudia Aldana   Phone:   +571-234-5190   Fax:     +571-234-5628   Bogota, Colombia   E-mail:  [email protected]   Website: http://www.ecopetrol.com.co/    Contact in USA   Lynn Morgen/Monique Skruzny, MBS Value Partners   Phone:    +1-212-750-5800   Fax:      +1-212-661-2268   E-mail: [email protected]           [email protected]  

Ecopetrol

CONTACT: Claudia Aldana, Investor Relations Officer, +571-234-5190, orFax, +571-234-5628, [email protected]; USA, Lynn Morgen,[email protected], or Monique Skruzny, [email protected],both of MBS Value Partners, +1-212-750-5800, or Fax, +1-212-661-2268

Web site: http://www.ecopetrol.com.co/