Van Duzen River

Van Duzen River
Van Duzen's Fork
River
Van Duzen River Bridge at Highway 101
Country	United States
State	California
Regions	Trinity County, Humboldt County
Part of	Eel River
Tributaries
- left	Little Van Duzen River, Little Larabee Creek, Hoagland Creek
- right	Grizzly Creek, Yager Creek
Cities	Dinsmore, Bridgeville, Carlotta, Hydesville, Rohnerville
Source	Hettenshaw Valley
- location	About 1.5 miles (2.4 km) south of Ruth Reservoir, Trinity County
- elevation	3,560 ft (1,085 m)
- coordinates	40°15′16″N 123°23′56″W / 40.25444°N 123.39889°W / 40.25444; -123.39889
Mouth	Eel River
- elevation	33 ft (10 m)
- coordinates	40°32′54″N 124°09′40″W / 40.54833°N 124.16111°W / 40.54833; -124.16111Coordinates: 40°32′54″N 124°09′40″W / 40.54833°N 124.16111°W / 40.54833; -124.16111
Length	63 mi (101 km)
Basin	429 sq mi (1,111 km2)
Discharge	for near Bridgeville
- average	846 cu ft/s (24 m3/s)
- max	48,700 cu ft/s (1,379 m3/s)
- min	2.9 cu ft/s (0 m3/s)
Map of the Eel River basin including the Van Duzen River

The Van Duzen River is a river on the north coast of California. It is a major tributary of the Eel River and drains 429 square miles (1,110 km²), mostly in Humboldt County, with a small portion in Trinity County. The river travels 63 miles (101 km) from its headwaters on the west side of the North Coast Range to its confluence with the Eel River, about 14 miles (23 km) upstream from the Pacific Ocean and 17 miles (27 km) south of Eureka, California. The river's elevation is over 5,000 feet (1,500 m) at its source and only 60 feet (18 m) when it merges with the Eel River. The river has two forks in its upper reaches. The North Fork travels northwest until it reaches the small town of Dinsmore, where it starts flowing west. The Little Van Duzen, which also flows northwest, joins the North Fork a few miles later. The river flows roughly west from then on. It meets its largest tributary, Yaeger Creek, about 5 miles (8.0 km) before it reaches the Eel River.

The river is used for recreation at locations including Grizzly Creek Redwoods State Park and for industrial, agricultural and municipal water supply by residents living along the western portion of California State Route 36. The river also provides wildlife habitat for preservation of rare and endangered species including cold freshwater habitat for fish migration and spawning. The primary land use in the watershed is timberland. Road construction and poor logging practices, particularly historical, have increased erosion, leading to excessive sediment buildup in the river and its tributaries. In addition, gravel mining, particularly at the confluence of the Van Duzen and Eel River, has increased erosion, affected channel alignment and may block fish migration.