[2] Chetwoot is a compound word from the Chinook Jargon chet’-woot or its’woot meaning black bear or grizzly.

[3] Chetwoot Lake is nestled in a long structural benchland with relatively level or gently inclined land bounded by the distinctly steeper slopes of Tourmaline Peak on the northwest shore of the lake and Atrium Peak above and between Angeline and Big Heart Lake.

The valley follows patterns of geomorphology typical of the Northern Cascade Mountains of the Pacific Mountain System with a bedrock composed of pyrrhotite and pyrite found in thin seams 804 metres (2,638 ft) wide at a depth of 304 metres (997 ft) below the surface.

[6] The host rock in this area is greensand from the Lopingian epoch 260 to 250 million years ago.

[10] Self-issued Alpine Lake Wilderness permit required for transit within the Necklace Valley area.