The float
Your selected stretch on the actual channel, drawn from the same NHDPlus centerline the river miles are measured along.
Your float
Rest of the river
Put-in
Take-out
Other access
USGS gage
Whitewater
Confluence
Plan your float
Trip briefing
Choose a reach and departure time.
Flow in context
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Estimation model
The calculation sits behind a fixed interface, so each generation replaces the last without touching the data layer or this page. The active model's coefficients were measured on this river, not chosen to look reasonable.
Report an actual trip
Reported durations are stored against the discharge and wind that were live at launch. This is the dataset a calibrated model gets fitted to — which is why collection starts now, before the model exists.