North Fork Koyukuk River
Encyclopedia
Koyukuk River
The Koyukuk River is a principal tributary of the Yukon River, approximately 500 mi long, in northern Alaska in the United States.It drains an area north of the Yukon on the southern side of the Brooks Range...
, approximately 105 mi (160 km) long, in northern Alaska
Alaska
Alaska is the largest state in the United States by area. It is situated in the northwest extremity of the North American continent, with Canada to the east, the Arctic Ocean to the north, and the Pacific Ocean to the west and south, with Russia further west across the Bering Strait...
in the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It has a watershed
Drainage basin
A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...
area of 1850 square miles (4790 square km). It rises on the south slopes of the Continental Divide
Continental Divide
The Continental Divide of the Americas, or merely the Continental Gulf of Division or Great Divide, is the name given to the principal, and largely mountainous, hydrological divide of the Americas that separates the watersheds that drain into the Pacific Ocean from those river systems that drain...
in the Brooks Range
Brooks Range
The Brooks Range is a mountain range in far northern North America. It stretches from west to east across northern Alaska and into Canada's Yukon Territory, a total distance of about 1100 km . The mountains top out at over 2,700 m . The range is believed to be approximately 126 million years old...
.
It is located the in Gates of the Arctic National Park and Preserve
Gates of the Arctic National Park and Preserve
Gates of the Arctic National Park and Preserve is a U.S. National Park in Alaska. It is the northernmost national park in the U.S. and the second largest at 13,238 mi² , about the same size as Switzerland. The park consists primarily of portions of the Brooks Range of mountains...
and is part of the Koyukuk Wild and Scenic River as designated by the United States Congress
United States Congress
The United States Congress is the bicameral legislature of the federal government of the United States, consisting of the Senate and the House of Representatives. The Congress meets in the United States Capitol in Washington, D.C....
in 1980.
The major tributaries include the Glacier River, Tinayguk River
Tinayguk River
The Tinayguk River is a river in Alaska. It flows into the North Fork Koyukuk River in north-central Alaska....
, Clear River and flows into the Middle Fork of the Koyukuk River
Koyukuk River
The Koyukuk River is a principal tributary of the Yukon River, approximately 500 mi long, in northern Alaska in the United States.It drains an area north of the Yukon on the southern side of the Brooks Range...
.
Robert Marshall
Bob Marshall (wilderness activist)
Robert "Bob" Marshall was an American forester, writer and wilderness activist. The son of wealthy constitutional lawyer and conservationist Louis Marshall, Bob Marshall developed a love for the outdoors as a young child...
thoroughly explored the system in 1929, naming many of the major peaks such as Mount Doonerak, Frigid Crags, Boreal Mountain and the Gates of the Arctic pass.