Minnesota · Unknown Co.
Watonwan River
· 37 mi · Class
Optimal: 225–675 CFS · USGS #05319500
426CFS
2.28 ft gauge height
Optimal↓Falling slowly (-17 cfs/hr)
Avg flow: 452 cfsHist. median: 0 cfsUSGS #05319500
Designated Water Trail · State
Although the river flows quickly at times, it is generally placid. Most paddlers particularly enjoy the 30-mile segment from Madelia to the river's confluence with the Blue Earth River at Garden City. Some of the most scenic and interesting paddling in this area is found along the stretch below the Rapidan Dam to the confluence of the Blue Earth River and the Minnesota River at Sibley State Park in Mankato. There are no major rapids.
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 Watonwan River? Your local knowledge makes this page better for every paddler, angler, and guide who comes after you.
Improve This River →