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Largest rivers in Alaska by average flow

Active USGS stream gauges in Alaska, ranked by average flow. The Yukon River at Pilot Station AK gauge leads with 236,813 cfs.

Find gauges near you

RankNameAverage flow
1Yukon River at Pilot Station AK236,813 cfs
2Yukon River near Stevens Village AK122,238 cfs
3Yukon River at Eagle AK83,907 cfs
4Copper River at Million Dollar Bridge near Cordova AK64,669 cfs
5Stikine River near Wrangell AK53,239 cfs
6Alsek River at Dry Bay near Yakutat AK45,013 cfs
7Kuskokwim River at Crooked Creek AK41,571 cfs
8Tanana River at Nenana AK24,532 cfs
9Tanana River at Fairbanks AK20,348 cfs
10Kvichak River at Igiugig AK17,884 cfs
11Kobuk River near Kiana AK14,233 cfs
12Koyukuk River at Hughes AK13,971 cfs
13Kuskokwim River at Mcgrath AK13,730 cfs
14Taku River near Juneau AK12,916 cfs
15Susitna River at Gold Creek AK9,677 cfs
16Colville River at Umiat AK7,911 cfs
17Knik River near Palmer AK7,005 cfs
18Nuyakuk River near Dillingham AK6,363 cfs
19Kenai River at Soldotna AK5,986 cfs
20Kenai River below Skilak Lake Outlet near Sterling AK5,287 cfs
21Unuk River below Blue River near Wrangell AK4,975 cfs
22Matanuska River at Palmer AK3,887 cfs
23Talkeetna River near Talkeetna AK3,874 cfs
24Kenai River at Cooper Landing AK2,843 cfs
25Fortymile River near Steele Creek AK2,375 cfs
26Klehini River near Klukwan AK1,540 cfs
27Sagavanirktok River near Pump Station 3 AK1,513 cfs
28Unalakleet River above Chiroskey River near Unalakleet AK1,446 cfs
29Salcha River near Salchaket AK1,442 cfs
30Lowe River above Horsetail Falls near Valdez AK1,392 cfs
Average flowYukon River at Pilot St…236,813 cfsYukon River near Steven…122,238 cfsYukon River at Eagle AK83,907 cfsCopper River at Million…64,669 cfsStikine River near Wran…53,239 cfsAlsek River at Dry Bay …45,013 cfsKuskokwim River at Croo…41,571 cfsTanana River at Nenana …24,532 cfsTanana River at Fairban…20,348 cfsKvichak River at Igiugi…17,884 cfsKobuk River near Kiana …14,233 cfsKoyukuk River at Hughes…13,971 cfsKuskokwim River at Mcgr…13,730 cfsTaku River near Juneau …12,916 cfsSusitna River at Gold C…9,677 cfs
Average flow

How the Average flow figures spread in Alaska

  • The ranking covers the 86 gauges in Alaska that have a recorded average flow in this dataset.
  • The highest is Yukon River at Pilot Station AK at 236,813 cfs; the lowest is Wade C Tributary near Chicken AK at 1.1 cfs.
  • The median average flow is 548 cfs.
  • The gap between #1 Yukon River at Pilot Station AK and #2 Yukon River near Stevens Village AK is 114,575 cfs.
  • The page table lists the top 30.

Data: U.S. Geological Survey (USGS) (public domain, U.S. federal data).· Updated 2026-11-02 · Text generated from the data and checked against it.

Live values are provisional USGS data. Measurements only, not a safety assessment — for flood warnings see the National Weather Service.

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