Cabinet (1,020,960 acres), Custer (590,720 acres), Deerlodge (I, 080,220 acres), Flathead (2,092,785 acres), Gallatin (907,160 acres), Helena (930,180 acres), Jefferson (1, 2 55,3 20 acres), Kootenai (1,661,260 acres), Lewis and Clark (844,136 acres), Lolo (1,211,680 acres), Madison (1,102,860 acres), Missoula (1,237,509 acres) and Sioux (145,253 acres in Montana; 104,400 acres in SouthDakota).
The Snake river (which receives all the drainage of Idaho except small amounts taken by the Spokane, the Pend Oreille and the Kootenai in the N., all emptying directly into the Columbia, and by some minor streams of the S.E.
Are: Coeur d'Alene Lake, in Kootenai county, about 30 m.
Wide; and mostly in Bonner, but partly in Kootenai county, a widening of Clark Fork, Lake Pend Oreille, 60 m.
Mineral springs and hot springs are also a notable feature of Idaho's physiography, being found in Washington, Ada, Blaine, Bannock, Cassia, Owyhee, Oneida, Nez Perce, Kootenai, Shoshone and Fremont counties.