Lower Two Medicine Lake is located partly in Glacier National Park as well as on the Blackfeet Indian Reservation

Blackfeet Indian Reservation

The Blackfeet Indian Reservation or Blackfeet Nation is an Indian reservation of the Blackfeet tribe in Montana in the United States. It is located east of Glacier National Park and borders Canada to the north. Cut Bank Creek and Birch Creek make up part of its eastern and southern borders...

, in the U. S. state of Montana

Montana

Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

. The lake is natural but has a small dam which regulates the lake level and reduces the potential for downstream flooding.. Due to the fact that the lake lies partially on the Blackfeet Indian Reservation

Blackfeet Indian Reservation

The Blackfeet Indian Reservation or Blackfeet Nation is an Indian reservation of the Blackfeet tribe in Montana in the United States. It is located east of Glacier National Park and borders Canada to the north. Cut Bank Creek and Birch Creek make up part of its eastern and southern borders...

, a permit is necessary to fish in the eastern

East

East is a noun, adjective, or adverb indicating direction or geography.East is one of the four cardinal directions or compass points. It is the opposite of west and is perpendicular to north and south.By convention, the right side of a map is east....

half of the lake.