The Firehole River is located in northwestern Wyoming, and is one of the two major tributaries of the Madison River. It flows north approximately 21 miles (34 km) from its source in Madison Lake on the Continental Divide to join the Gibbon River at Madison Junction in Yellowstone National Park. It is part of the Missouri River system.
Firehole River
Firehole River upstream from Ojo Caliente bend, 1872
Firehole River at Midway Geyser Basin, 1875
Firehole River, 1894
The Madison River is a headwater tributary of the Missouri River, approximately 183 miles (295 km) long, in Wyoming and Montana. Its confluence with the Jefferson and Gallatin rivers near Three Forks, Montana forms the Missouri River.
Lower Madison River In Bear Trap Canyon Below Ennis, Montana