Colter's Hell is an area of fumaroles and hot springs on the Shoshone River near Cody in the U.S. state of Wyoming.

Its thermal activity has declined since its description by mountain man John Colter, who parted from the Lewis and Clark Expedition prior to its conclusion, and passed through the region in the winter of 1807–1808.

[2] Other early descriptions of Colter's Hell date back to the trapper Joseph Meek in the year of 1830, as well as to Plenty Coups (Alaxchíia Ahú), a principal chief of the Crow people, who camped with his tribe at the thermal area in 1840.

Other hot springs were located near the confluence of the north and south forks of the Shoshone, now drowned under the reservoir created by Buffalo Bill Dam.

Chittenden's speculation contradicts the earliest published description of the site, in Washington Irving's account of Captain Benjamin L.E.