This interactive map of Alaska shows every mapped river and stream in the state – 26,223 features totalling 207,044 miles, more than any other US state. Alaska’s waterbodies do not appear on the map because the USGS Detailed Water Bodies layer does not cover Alaska; the river layer, however, is fully populated.
The longest mapped river in Alaska is the Yukon River (649.7 mi mapped). Click any feature on the map for name, type, and length; use the layer toggles, basemap switcher, and name search above the map to explore.
About this map
Rivers are drawn from the USGS National Hydrography Dataset via the ESRI USA Rivers and Streams Living Atlas service. Lengths shown are per-feature segments rather than full course length: a single river is often stored as several connected segments. The blue overlay is a generalized hydrography layer for nationwide cartography — switch the basemap to Satellite at high zoom if you need to see exactly where each channel sits on the ground.
Longest mapped rivers in Alaska
The top mapped river segments in Alaska, ranked by the length of each named segment in the NHD.
| # | River | Type | Longest segment |
|---|---|---|---|
| 1 | Yukon River | Artificial Path | 649.7 mi |
| 2 | Koyukuk River | Stream | 521.7 mi |
| 3 | Innoko River | Stream | 473.4 mi |
| 4 | Noatak River | Stream | 409.9 mi |
| 5 | Tanana River | Stream | 398.6 mi |
| 6 | Colville River | Stream | 386.2 mi |
| 7 | Kobuk River | Stream | 344.8 mi |
| 8 | Iditarod River | Stream | 316.0 mi |
| 9 | Susitna River | Stream | 305.1 mi |
| 10 | North Fork Kuskokwim River | Stream | 300.1 mi |
Alaska water by the numbers
- Mapped rivers and streams: 26,223 features, 207,044 total mapped miles (national rank #1 of 51)
- Water bodies: The USGS Detailed Water Bodies layer does not currently cover Alaska, so Alaskan lakes are not yet included on this map.
Neighboring state maps
Return to the US Lakes and Rivers Interactive Map for national rankings and the all-states view.
