PRESS RELEASE

29 October 2015

Gran Tierra Announces Release Date for its 2015 Third Quarter Results, Conference Call and Webcast Details

CALGARY, ALBERTA–(Marketwired – Oct. 29, 2015) – Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE MKT:GTE)(TSX:GTE) announces that the Company will release its 2015 third quarter financial and operating results on Tuesday, November 3, 2015 at approximately 9:00 p.m. Mountain Time (11:00 p.m. Eastern Time). A conference call to discuss the third quarter 2015 results will be held at 10:00 a.m. Mountain Time (12:00 p.m. Eastern Time) on Wednesday, November 4, 2015. Details of the conference call are as follows:

Interested parties may also access the live webcast on the investor relations page of Gran Tierra’s website at www.grantierra.com. An archive of the webcast will be available on Gran Tierra’s website until the next earnings call. In addition, an audio replay of the conference call will be available following the call until November 20, 2015. To access the replay dial 1-800-408-3053 within North America (Toronto local dial 905-694-9451) or from outside Canada & USA call 800-3366-3052. When prompted, enter the pass code 7764254.

About Gran Tierra Energy Inc.

Gran Tierra Energy Inc. together with its subsidiaries is an independent international energy company engaged in oil and gas acquisition, exploration, development and production. Gran Tierra owns the rights to oil and gas properties in Colombia, Peru and Brazil.

Gran Tierra’s Securities and Exchange Commission filings are available on a web site maintained by the Securities and Exchange Commission at www.sec.gov and on SEDAR at www.sedar.com.

Contact Information:

For investor and media inquiries: Gran Tierra Energy Inc.
Gary Guidry
Chief Executive Officer
403-767-6500

Gran Tierra Energy Inc.
Ryan Ellson
Chief Financial Officer
403-767-6501

Gran Tierra Energy Inc.
Chris Metcalfe
Director, Investor Relations
403-698-7946
info@grantierra.com
www.grantierra.com