List of Longest Rivers in The United States By State - Idaho

Idaho

1. Snake River – 1,078 miles (1,735 km)
2. Bear River – 491 miles (790 km)
3. Kootenai River – 485 miles (781 km)
4. Salmon River – 425 miles (684 km)
5. Owyhee River – 346 miles (557 km)
6. Clark Fork – 310 miles (500 km)
7. Palouse River – 167 miles (269 km)
8. Bruneau River - 153 miles (246 km)
9. Big Wood River - 137 miles (220 km)
10. Blackfoot River - 136 miles (219 km)

See also List of rivers of Idaho.