James River
Brown / Beadle Co. · 710 mi · Class I
1,180CFS/ 8.12 ft
Optimal→Stable
Optimal: 200–2000 CFS · USGS #06477000
Length
Difficulty
Optimal
Avg Flow
Hist. Median
USGS Gauge
James River Water Trail candidate
The longest unnavigable river in America — or so the old joke goes. The James meanders 710 miles from North Dakota to the Missouri, making it one of the longest tributaries in the country. In reality, the James is navigable for much of its length and offers classic Great Plains prairie paddling through endless grassland.
Trip sections
Aberdeen to Huron — 120 mi, upper James, slow prairie meanders
Huron to Mitchell — 100 mi, middle James, wider channel
Mitchell to Yankton — 150 mi, lower James, deeper and faster to the Missouri
Outfitters
James River Canoe Trail
Access point information and seasonal conditions
72-Hour Flow Forecast
NOAA NWPSLoading forecast...
10-Year Flow Patterns
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Data Quality
River conditions are community-verified. CFS ranges, difficulty ratings, and trip sections may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level. If you spot an error, use the Improve This River button at the top of the page — your local knowledge is what makes this atlas accurate.