Flat Mountain Trail is a round-trip hike of 7.8 mi / 12.6 km near Pierce, ID. Expect about 3,799 ft / 1,158 m of elevation gain, with a high point of 6,581 ft / 2,006 m. Difficulty: Hard. At an average pace, plan on about 5 hr 24 min. High-elevation trail, usually snow-free from mid-July into October. Before then, expect snow and possible avalanche danger.
Elevation profile
Along the route: low 2,828 ft / 862 m · high 6,581 ft / 2,006 m