For 10 points, name this largest mountain range in Western North America.
One subrange of this mountain range contains Mount Roosevelt, Mount Churchill, and Dieppe Mountain, and another subrange contains the Liard River and Muncho Lake. This mountain range contains the Battle of Britain Range and the Terminal Range as well as the sources of the Athabasca and Kicking Horse Rivers in Jasper and Yoho National Parks. In this range, the Royal Gorge cuts through Fremont Peak, and the Jackson and Blackfoot Glaciers are in this mountain range's Glacier National Park. The Teton range of this mountain range lies north of the state which contains this range's Mt. Elbert and Pike's Peak. For 10 points, name this largest mountain range in Western North America.
One subrange of this mountain range contains Mount Roosevelt, Mount Churchill, and Dieppe Mountain, and another subrange contains the Liard River and Muncho Lake.
Rocky Mountains [or Rockies; accept Canadian Rockies before "Fremont Peak"; accept Muskwa Ranges before "Athabasca"; accept Battle of Britain Range before "Liard River"]