Montana topographic maps

Average elevation: 1,511 m

Average elevation: 1,519 m

Average elevation: 1,490 m

Average elevation: 845 m

Average elevation: 890 m

Average elevation: 1,492 m

Average elevation: 2,042 m

Average elevation: 830 m

Average elevation: 741 m

Average elevation: 1,496 m

Average elevation: 1,011 m

Average elevation: 746 m

The Tongue River is fed by winter snow pack from the higher elevations of the Big Horn Mountains, early snow runoff of the lower elevations in the drainage basin, and ground water from springs in the drainage basin. The river rises in March and April due to snowmelt in the lower elevations, and again in June…

Average elevation: 1,050 m