Shasta River
| Shasta River(Riviere Des Sastes) | |
| Sastise River, Sasty River | |
| River | |
 Shasta River from State Route 263
|
|
| Country | United States |
|---|---|
| State | California |
| Region | Siskiyou County |
| City | Yreka |
| Source | Mount Eddy |
| - location | 10 miles (16 km) south of Weed, Siskiyou County |
| - coordinates | 41°24′12″N 122°26′06″W / 41.40333°N 122.43500°W |
| Mouth | Klamath River |
| - location | Junction of California SR's 263 and 96 |
| - elevation | 2,037 ft (621 m) |
| - coordinates | 41°49′51″N 122°35′39″W / 41.83083°N 122.59417°WCoordinates: 41°49′51″N 122°35′39″W / 41.83083°N 122.59417°W |
| Length | 58 mi (93 km) |
| Basin | 800 sq mi (2,072 km2) |
| Discharge | for Yreka |
| - average | 183 cu ft/s (5 m3/s) |
| - max | 21,500 cu ft/s (609 m3/s) |
| - min | 1.5 cu ft/s (0 m3/s) |
The Shasta River is a tributary of the Klamath River, approximately 58 miles (93 km) long, in northern California in the United States. It drains the Shasta Valley on the west and north sides of Mount Shasta in the Cascade Range.
The river rises in southern Siskiyou County on the edge of the Shasta-Trinity National Forest, approximately 10 miles (16 km) southwest of Weed. It flows generally northwest through the Shasta Valley, past Weed, through Lake Shastina, and past Montague. It joins the Klamath from the south approximately 8 miles (13 km) north-northeast of Yreka.
The Shasta Valley is dominated by nearby Mount Shasta and underlain with volcanic basalt from eruptions of the mountain in recent geologic time. Pluto's Cave is an example of voids remaining after highly fluid lava drained from underground conduits which were fed by volcanic vents to the east. The Shasta Valley is covered with small hillocks extending from the base of Mt. Shasta north to just beyond the city of Montague, that are the debris from the liquefication of the ancestral Mount Shasta sometime within the past 400,000 years.
Rising on the east slope of Mount Eddy several miles west of Mount Shasta and about 25 miles (40 km) northwest of Shasta Lake, the Shasta River immediately proceeds to flow through a wide agricultural valley. Running north, parallel to Interstate 5, for the next few miles, the Shasta receives its first important tributary, Eddy Creek, from the left, 37 miles (60 km) from the mouth. It then crosses under the interstate, winds past a ridge, and passes the town of Weed. It then turns northeast into Lake Shastina, an artificial lake formed by a dam at its north end, and turns northwest.
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Wikipedia