CALGARY, Aug. 4 /PRNewswire-FirstCall/ -- Gran Tierra Energy Inc. (NYSE Amex: GTE, TSX: GTE), a company focused on oil exploration and production in South America, announced today that it will host its second quarter 2009 results conference call on Monday, August 10th at 10:00 a.m. Eastern Daylight Time (EDT). Prior to the conference call, Gran Tierra Energy will release its financial results at 7:00 a.m. EDT. President and CEO Dana Coffield, CFO Martin Eden, and COO Shane O'Leary will discuss Gran Tierra Energy's financial and operating results for the quarter and then take questions from securities analysts and institutional shareholders. To pre-register for this conference call, please visit: https://www.theconferencingservice.com/prereg/key.process?key=PAFK7EB3M Interested parties may access the conference call by dialing 1-888-713-4199 (domestic) or 617-213-4861 (international), pass code 85503441. The call will also be available via web cast at http://www.grantierra.com/, http://www.streetevents.com/, or http://www.fulldisclosure.com/. The web cast will be available on Gran Tierra Energy's website until the next earnings call. If you are unable to participate, an audio replay of the call will be available beginning two hours after the call until 11:59 p.m. on August 17, 2009. To access the replay dial 888-286-8010 (domestic) or 617-801-6888 (international) pass code 41557388. Please connect at least 15 minutes prior to the conference call to ensure adequate time for any software download that may be required to join the webcast. About Gran Tierra Energy Inc. Gran Tierra Energy Inc. is an international oil and gas exploration and production company, headquartered in Calgary, Canada, incorporated in the United States, trading on the NYSE Amex Exchange (GTE) and the Toronto Stock Exchange (GTE), and operating in South America. Gran Tierra Energy holds interests in producing and prospective properties in Argentina, Colombia and Peru. Gran Tierra Energy has a strategy that focuses on establishing 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 (866) 973-4873. Gran Tierra Energy's Securities and Exchange Commission filings are available on a web site maintained by the Securities and Exchange Commission at http://www.sec.gov/ and on SEDAR at http://www.sedar.com/. DATASOURCE: Gran Tierra Energy Inc. CONTACT: For media and investor inquiries please contact Thomas McMillan, Equicom Group, (866) 973-4873, (403) 536-5903,

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