Middle Fork Boulder Trail is a round-trip hike of 8.6 mi / 13.9 km near Bonners Ferry, ID. Expect about 3,317 ft / 1,011 m of elevation gain, with a high point of 6,102 ft / 1,860 m. Difficulty: Hard. At an average pace, plan on about 5 hr 27 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 3,071 ft / 936 m · high 6,093 ft / 1,857 m