| John River | |
| Name Etymology: | John Bremner |
| Map Size: | 300 |
| Pushpin Map: | USA Alaska |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of the John River in Alaska |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Alaska |
| Subdivision Type4: | District |
| Subdivision Name4: | North Slope Borough, Yukon - Koyukuk Census Area |
| Length: | 125miles |
| Source1: | confluence of Contact and Inukpasugruk creeks |
| Source1 Location: | Endicott Mountains, Brooks Range, North Slope Borough |
| Source1 Coordinates: | 68.1261°N -151.7564°W[1] |
| Source1 Elevation: | 2076feet[2] |
| Mouth: | Koyukuk River[3] |
| Mouth Location: | 1miles northeast of Bettles, Yukon - Koyukuk Census Area |
| Mouth Coordinates: | 66.9136°N -151.6536°W |
| Mouth Elevation: | 600feet |
The John River (Iñupiaq: Atchiiniq[4]) is a 125miles tributary of the Koyukuk River in the northern part of the U.S. state of Alaska.[3] It was named after John Bremner, a prospector and explorer who was one of the first non-native persons to go there.[3] It flows south from Anaktuvuk Pass in Alaska's Brooks Range, into the larger river at a point near Bettles,[3] slightly north of the Arctic Circle.[5]
In 1980, the 52miles segment of the John River within the Gates of the Arctic National Park and Preserve were designated "wild" and added to the National Wild and Scenic Rivers System.[6] The designation means that the segment is unpolluted, free-flowing, and generally inaccessible except by trail.[7]
The John River Valley is an important migration route for Arctic caribou.[6]
In 1901, the Schrader-Peters expedition explored the John River, the Anaktuvuk River, and continued onward to Point Barrow. In 1931, Robert "Bob" Marshall explored the John River up to the Arctic Divide, and described seeing a "quadruple rainbow".[8] [9]
It is possible to run the John River in canoes, kayaks, and small rafts, though conditions vary from place to place. The upper 35miles are rated Class III (difficult) on the International Scale of River Difficulty and "should be attempted only by experienced paddlers with solid wilderness skills."[10] Below this, the river is rated Class II (medium) for the next 47miles, then Class I on the lower reaches all the way to the mouth. Dangers on the upper river include sustained whitewater, swift currents, a difficult 40NaN0 portage, and the possibility of water too shallow to run.[10]