The Clackamas River is a tributary of the Willamette River, approximately 85 mi (137 km) long, in northwestern Oregon in the United States.The river drains an area of approximately 940 square miles. In its upper reaches, it passes through mostly forested, rugged mountainous terrain, while in its lower third, it passes through agricultural and urban areas. The Willamette River (pronounced wil-LAM-met) is a tributary of the Columbia, approximately 240 mi (386 km) long, in northwestern Oregon in the United States. ... State nickname: Beaver State Other U.S. States Capital Salem Largest city Portland Governor Ted Kulongoski Official languages None Area 255,026 km² (9th)  - Land 248,849 km²  - Water 6,177 km² (2. ...

It rises in eastern Marion County, approximately 55 mi (89 km) ESE of Salem. The headwaters are in the Mount Hood National Forest in the Cascades, on the slopes of Ollalie Butte, at an altitude of approximately 6000 ft (1800 m), approximately 10 mi (16 km) north of Mt. Jefferson. It flows briefly north, then northwest through the mountains, passing through North Fork Reservoir, then passing Estacada and emerging from the mountains southeast of Portland. It joins the Willamette near Oregon City. Marion County is a county located in the state of Oregon. ... State Capitol building in Salem Salem is the capital of the state of Oregon in the United States of America, and county seat of Marion County. ... Old-growth Douglas Fir in the Mount Hood National Forest The Mount Hood National Forest is located 20 miles (32 km) east of the city of Portland, Oregon, and the northern Willamette River valley. ... Mount Adams in Washington state The Cascade Range is a mountainous region famous for its chain of tall volcanos called the High Cascades that run north-south along the west coast of North America from British Columbia to the Shasta Cascade area of northern California. ... For other mountains named Mount Jefferson, see Mount Jefferson Mount Jefferson is a possibly extinct stratovolcano in the Cascade Range and is the second-highest mountain in Oregon. ... Sculpture in front of City Hall in downtown Estacada Estacada is a city located in Clackamas County, Oregon, roughly 30 miles southeast of Portland. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Municipal Elevator in Oregon City Oregon City is the first city in the United States incorporated west of the Rockies. ...

The river supports runs of Coho, Spring and Fall Chinook, and Summer and Winter steelhead. It is a popular destination for recreational fishing and whitewater rafting. It also provides hydroelectric power and drinking water for the Portland metropolitan area. Binomial name Oncorhynchus kisutch (Walbaum, 1792) The Coho salmon (Oncorhynchus kisutch - from the Russian Kisutch - кижуч) is a species of anadromous fish in the salmon family. ... Binomial name Oncorhynchus tshawytscha (Walbaum, 1792) The Chinook salmon (Oncorhynchus tshawytscha) (derived from Russian чавыча), is a species of Anadromous fish in the salmon family. ... Binomial name Oncorhynchus mykiss Walbaum, 1792 The rainbow trout (Oncorhynchus mykiss), also called steelhead trout, is a single species of trout native to the Pacific Ocean and in North American rivers and lakes west of the Rocky Mountains. ... Fishing from a Pier Fishing is a term applied to any activity which aims to capture fish or shellfish for subsistence, scientific, commercial or recreational purposes. ... Rafting is a recreational activity utilizing a raft to navigate a river or other body of water. ... Hydroelectric dam diagram The waters of Llyn Stwlan, the upper reservoir of the Ffestiniog Pumped-Storage Scheme in north Wales, can just be glimpsed on the right. ...

Regulation of the river began in 1905 with the Cazadero Dam. In 1912, the River Mill Dam intercepted wood and coarse sediment. Later dams at North Fork, Oak Grove, Stone Creek, Timothy Lake also intercepted wood sediment on the lower river. 1905 was a common year starting on Sunday (see link for calendar). ... 1912 is a leap year starting on Monday. ...

Forty-seven miles (75 km) of the river, as well as 14 mi (24 km) of its tributary the Roaring River, have been designated as the Clackamas Wild and Scenic River.

See also

• List of Oregon rivers

The following is a partial listing of rivers in the state of Oregon, United States of America. ...

External links

• AllAboutRivers Clackamas River Rafting Guide Online rafting guide for the Clackamas River
• Clackamas River Basin Council
• NPS: Clackamas Wild and Scenic River
• SWRP: The Clackamas River
• Clackamas River watershed map