Located near the town of Cholila in the province of Chubut, this natural area spans approximately 64,155 hectares, encompassing the upper and part of the middle basin of the Tigre River, which flows into the western end of Lake Cholila. This zone forms the headwaters of the Futaleufú River basin and complements the protection provided to that basin by Los Alerces National Park. It is one of three new reserves established in 2018, alongside Huemul Hielo and Río Engaño, joining existing protected areas to bring the total protected forested area to 565,000 hectares.