About
Big Hole River, Montana — 1805 Lewis Clark, 1877 Nez Perce Battle, 1988 Big Hole National Battlefield. Arctic grayling persist in the upper Big Hole through Beaverhead County — the last native population remaining in the lower 48 states. This 153-mile Montana Blue-Ribbon stream begins in high mountain meadows above Wisdom, where Class I water meanders through sage flats before entering the canyon transition from Divide to Melrose with occasional Class I-II drops. Below Melrose, the river opens into wide valley bottomland as it approaches the Jefferson confluence. At 680 CFS average with an optimal range of 500-3000, the Big Hole rewards timing — spring runoff pushes flows well above the sweet spot, while late summer can drop below fishable levels. The 2023 Arctic Grayling Conservation designation reflects ongoing efforts to protect the species' final stronghold, with special regulations in the upper river where these native salmonids still spawn in tributaries each spring. USGS gauge 06024540 tracks conditions for the middle and lower sections.
River conditions are community-verified. CFS ranges, difficulty ratings, and access points may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level.