• Participation (northern 30% of the block) – Gran Tierra (Operator) 50%, Trayectoria Oil & Gas 50%
• Participation (southern 70% of the block) – Gran Tierra (Operator) 85%, Trayectoria Oil & Gas 15%
• Area – 393,137 acres (gross); 294,340 acres (net)

Gran Tierra acquired its interest at Catguas (in the Catatumbo basin) via the merger with Solana Resources in November, 2008. The block is governed by the terms of an Exploration and Exploitation Contract with the government agency ANH.