Nine subalpine lakes sit in high cirques in the higher reaches, with several peaks topping 10,000'.

[1] About 32,000 acres are roadless in the Montana portion, with an unknown amount in Idaho.

[1] Dense forests, pristine streams, rolling tundra, and grassy parks provide year-round habitat for grizzly bears, elk, and bighorn sheep.

[1] Rocks and soils are inherently unstable, a factor in the landslide that caused much loss of life in 1959.

[1] The instability exists because the range is basically limestone blocks sitting on top of shale and Yellowstone volcanic rocks.