River Explorer
Rivers in California
Community-mapped river reaches across California. Length and live USGS flow where a gauge sits on the water.
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The map shows a sample. Zoom in to see every one in view.
- Free to browse
- USGS-sourced rivers
- Open in the app for live flow and tracking
State rankings
River data from the USGS National Hydrography Dataset (public domain). Live flow, where shown, from USGS Water Data.
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