[2] The peak is located about 0.5 mi (0.80 km) inside Franklin County, Maine.

The southwest end of Caribou's summit ridge is in Le Granit Regional County Municipality, Québec.

The southeast side of Caribou Mountain drains into Number Six Brook, then into the South Branch of the Moose River.

The southwest end of Caribou Mountain drains into Rivière aux Araignées in Saint-Augustin-de-Woburn, Quebec, then into Lac aux Araignées, Lac Mégantic, the Rivière Chaudière, the Saint Lawrence River, and into the Gulf of Saint Lawrence.

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