Alaska · Unknown Co.
Fortymile River
★ Wild & Scenic
· 39 mi · Class
Optimal: 1450–4400 CFS · USGS #15348000
7,170CFS
75.88 ft gauge height
Above Optimal↓Falling slowly (-10 cfs/hr)(-100 in 3h)
Avg flow: 2,922 cfsHist. median: 0 cfsUSGS #15348000
National Wild & Scenic River · Bureau of Land Management
About
Wild & Scenic designation protects 39 miles of the Fortymile River under Bureau of Land Management administration. At 2,922 CFS average flow, the river runs substantially higher than most designated streams, with optimal conditions ranging from 1,450 to 4,400 CFS according to gauge 15348000. The main stem comprises the entire Wild & Scenic corridor, flowing through undeveloped country that requires coordination with BLM for access and camping permits.
Solunar Fishing Activity
🌖
Waning Gibbous
88% illumination
Poor
★ Moon overhead
12:00 PM
Moonrise
11:26 AM☀
Moonset
12:34 PM
★ Moon underfoot
12:00 AM
Next full moon: Jun 2926 days
10-Year Flow Patterns
See 10 years of flow patterns for this river — historical analysis is a Pro feature.Upgrade to Pro →
Your Optimal Range
Set your personal optimal CFS window per river — custom ranges are a Pro feature.Upgrade to Pro →
Data Quality
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.
Know the Fortymile River? Your local knowledge makes this page better for every paddler, angler, and guide who comes after you.
Improve This River →