Bighorn Mountains

The Bighorn Mountains (Apsáalookěi: Basawaxaawúua or Iisaxpúatahchee Isawaxaawúua) are a mountain range in northern Wyoming and southern Montana in the United States, forming a northwest-trending spur from the Rocky Mountains extending approximately 200 miles (320 km) northward on the Great Plains. They are separated from the Absaroka Range, which lie on the main branch of the Rockies in western Wyoming, by the Bighorn Basin.