Class IVBitterroot Mountains, ID
Lochsa River
8,530 CFS→
High OptimalAbout this run
The Lochsa is Idaho's great spring flood — a 50-mile corridor of continuous Class III-IV rapids tucked along US-12 in the Bitterroot Mountains. Snowmelt from the Clearwater Range turns this wilderness river into one of the country's best sustained high-volume runs from April through June. The gradient is relentless, the scenery is roadless wilderness, and nearly every bend brings another wave train or technical rapid. The Lochsa demands high-water skills and solid bracing — but rewards paddlers with mile after mile of world-class whitewater.
Known Hazards
- Lochsa Falls — Class V, mandatory portage, scout carefully before approach
- High volume above 10,000 CFS creates keeper hydraulics throughout
- 50-mile corridor means committing to the run — no easy bailout points
- Cold late-spring water (45-50°F) — dry suit mandatory
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Post a TripCurrent Flow
8,530CFS→
stable
Too LowOptimal RangeHigh
Current8,530 CFS
Optimal Min3,000 CFS
Optimal Max10,000 CFS
StatusHigh Optimal
7-Day Flow
05/238,600 CFS05/28
River Info
RegionBitterroot Mountains
StateID
DifficultyClass IV
USGS Gauge13337000
RunnableYes