The park includes parts of the municipalities of Lesja, Skjåk, Vågå, Lom, Fjord, and Rauma.

The park consists of much of the Tafjordfjella mountain range as well as the reindeer habitat in the northern part of the Ottadalen valley.

Much of the original alpine ecosystem, including wild reindeer, wolverines, golden eagles, gyr falcons, and ptarmigans, is still intact.

In the west, it is very dramatic, with sharply pointed peaks and knife-edge ridges, and rapidly flowing rivers.

Towards the east, the terrain is more gently sloping, plateaus occur, valleys are broader and rivers flow more slowly.