The Pit River or Pitt River is a major river watershed draining Northeastern California into the State's Central Valley.
While it is accounted a tributary of the Sacramento River, the Pit River actually contributes as much as eighty percent of the water at their junction near Redding, California in the United States. The longest tributary of the Sacramento, it is approximately 110 mi (176 km) long, extending from its origin in the Warner Mountains in the northeastern corner of California to the northernmost portions of the Sacramento Valley. It drains a sparsely-populated volcanic highlands area, passing through the south end of the Cascade Range in a spectacular canyon northeast of Redding. The river is so named because of the pits the Achumawi dug to trap game that came to water at the river.
The combined river flows WSW in a winding course across Modoc County, past Canby and through the Modoc National Forest in a narrow gorge called Stonecoal Valley. It turns south to flow past Lookout and into northern Lassen County, past Bieber to emerge into the ranching region of Big Valley. North of Little Valley it runs east into northeastern Shasta County, passing through the Cascades in a serpentine canyon in the Shasta National Forest. It flows past Pittville, Macarthur, and Fall River Mills to join the Sacramento River as the eastern arm of Shasta Lake reservoir, approximately 15 mi (24 km) north of Redding. The lower 15 mi (24 km) of the river now forms the longest "arm" of the five of Lake Shasta, which is formed by Shasta Dam on the Sacramento downstream from the original confluence.
The river is a popular destination for fly fishing, rafting in its lower reaches, and is used for hydroelectric energy both in the powerhouses below Fall River Mills and at Shasta Dam. It is also used extensively for irrigation and conservation purposes.
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"Pit River".
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