Lake River (Washington)
| Lake River | |
| Country | United States |
|---|---|
| State | Washington |
| County | Clark |
| Source | Vancouver Lake |
| - location | Vancouver |
| - elevation | 8 ft (2 m) |
| - coordinates | 45°41′53″N 122°43′05″W / 45.69806°N 122.71806°W |
| Mouth | Columbia River |
| - location | near Ridgefield |
| - elevation | 7 ft (2 m) |
| - coordinates | 45°50′37″N 122°46′50″W / 45.84361°N 122.78056°WCoordinates: 45°50′37″N 122°46′50″W / 45.84361°N 122.78056°W |
| Length | 11 mi (18 km) |
| Basin | 100 sq mi (259 km2) |
  Location of the mouth of Lake River in Washington
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Lake River is a tributary, about 11 miles (18 km) long, of the Columbia River in the U.S. state of Washington. It flows north from Vancouver Lake in Vancouver to meet the larger river near Ridgefield and the northern tip of Bachelor Island. The Wilkes Expedition of 1841 referred to Lake River as Calipaya Inlet.
The river is part of the 32-mile (51 km) Lewis River – Vancouver Lake Water Trail linking Vancouver Lake to Woodland by waters suitable for kayaks and other boats. Portions of the Ridgefield National Wildlife Refuge border the river.
Lake River, a "slow, flat slough of the Columbia River", loses only 1 foot (30 cm) in elevation over its entire 11-mile (18 km) course. It flows north, roughly parallel to the Columbia until curving slightly northwest to join it. At times, tidal fluctuations and high flows along the Columbia cause Lake River to flow backwards into the lake, sometimes for long periods.
Flowing out of the lake and Vancouver Lake Park, the river receives Buckmire Slough from the . Beyond the confluence, Shillapoo Wildlife Area is to the left, and the unincorporated community of Felida is to the . About 1.5 miles (2.4 km) further downstream, Salmon Creek enters from the right.
Over the next 0.5 miles (0.8 km), the river passes between Curtis Lake on the right and Round Lake on the left. About 8 miles (13 km) from the mouth, Lake River enters Ridgefield National Wildlife Refuge and passes between Green Lake on the right and Post Office Lake on the left. Whipple Creek enters from the right at RM 7 (RK 11). Over the next 2 miles (3 km), Campbell Lake is on the left. Flume Creek enters from the right about 4.5 miles (7.2 km) from the mouth.
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