Company to Host Conference Call on February 26, 2009 at 11:00 a.m. Eastern Time CALGARY, Alberta, Feb. 23 /PRNewswire-FirstCall/ -- Gran Tierra Energy Inc. (NYSE Alternext: GTE; TSX: GTE), a company focused on oil exploration and production in South America, today announced that the company's senior management will discuss the company's results of operations for the fourth quarter and fiscal year ended December 31, 2008 during a conference call scheduled for Thursday, February 26, 2009, at 11:00 a.m. Eastern Time. The company's financial results for the fourth quarter and fiscal year are scheduled to be released earlier that day. What: Gran Tierra Energy Inc.'s Fourth Quarter Results of Operations Conference Call When: Thursday, February 26, 2009, 11:00 a.m. Eastern Web cast address: http://www.streetevents.com/, http://www.fulldisclosure.com/ Dial-in Numbers: (888) 713-4218 (domestic) or (617) 213-4870 (international), pass code # 43836235 Contact: Al Palombo, Cameron Associates, (212) 245-8800 Ext. 209, Participants may pre-register for the call at: https://www.theconferencingservice.com/prereg/key.process?key=PEU6PFNYD . Pre-registrants will be issued a pin number to use when dialing into the live call which will provide quick access to the conference by bypassing the operator upon connection. If you are unable to participate, an audio replay of the call will be available beginning two hours after the call and will be available until 11:59 p.m. on March 5, 2009, by dialing (888) 286-8010 (domestic) or (617) 801-6888 (international) using confirmation pass code 72426646. An audio replay of the call will also be available on Gran Tierra Energy's web site, http://www.grantierra.com/, until the next earnings call. About Gran Tierra Energy Inc. Gran Tierra Energy Inc. is an international oil and gas exploration and production company operating in South America, headquartered in Calgary, Canada, incorporated in the United States, and trading on the NYSE Alternext (GTE) and the Toronto Stock Exchange (GTE). The company holds interests in producing and prospective properties in Colombia, Argentina, and Peru. The company has a strategy that focuses on growing a portfolio of producing properties, plus production enhancement and exploration opportunities to provide a base for future growth. Additional information concerning Gran Tierra Energy is available at http://www.grantierra.com/. Investor inquiries may be directed to or 1-800-916-4873. Contacts: Dana Coffield Al Palombo Gran Tierra Energy Inc. Cameron Associates President & Chief Executive Officer Investor Relations (866) 973-4873 (212) 554-5488 DATASOURCE: Gran Tierra Energy Inc. CONTACT: Dana Coffield, President & Chief Executive Officer of Gran Tierra Energy Inc., 1-866-973-4873, ; or Al Palombo, Investor Relations of Cameron Associates, +1-212-554-5488, , for Gran Tierra Energy Inc. Web site: http://www.grantierra.com/

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