River Explorer

Rivers in Colorado

Community-mapped river reaches across Colorado. Length, class, and live USGS flow where a gauge sits on the water.

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Free to browse
USGS-sourced rivers
Open in the app for live flow and tracking

State rankings

Longest River Runs in Colorado

River data from the USGS National Hydrography Dataset (public domain). Live flow, where shown, from USGS Water Data.

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