Snohomish River
| Snohomish River | |
 Snohomish River at Snohomish
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| Country | United States |
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| State | Washington |
| Source | Confluence of the Skykomish River and the Snoqualmie River |
| - location | Monroe |
| - coordinates | 47°49′48″N 122°2′47″W / 47.83000°N 122.04639°W |
| Mouth | Puget Sound |
| - location | Port Gardner |
| - elevation | 0 m (0 ft) |
| - coordinates | 48°1′16″N 122°12′30″W / 48.02111°N 122.20833°WCoordinates: 48°1′16″N 122°12′30″W / 48.02111°N 122.20833°W |
| Length | 20 mi (32 km) |
| Basin | 1,856 sq mi (4,807 km2) |
| Discharge | for Near Monroe |
| - average | 9,511 cu ft/s (269 m3/s) |
| - max | 150,000 cu ft/s (4,248 m3/s) |
| - min | 763 cu ft/s (22 m3/s) |
 Map of the Snohomish River and tributaries
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  Mouth of the Snohomish River in Washington
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The Snohomish River is a river in the U.S. state of Washington, formed by the confluence of the Skykomish and Snoqualmie rivers near Monroe. It flows northwest entering Port Gardner Bay, part of Puget Sound, between Everett and Marysville. The Pilchuck River is its main tributary and joins the river at Snohomish. The river system drains the west side of the Cascade Mountains from Snoqualmie Pass to north of Stevens Pass.
Measured at Monroe, the Snohomish River has an average annual flow of 9,500 cubic feet per second (270 m3/s). In comparison, the Columbia River, Washington's largest river, has an average flow of about 265,000 cubic feet per second (7,500 m3/s).
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