Riffe Lake

Riffe Lake
Riffe Lake Show map of Washington (state) Riffe Lake Show map of the United States
Location	Lewis County, Washington, United States
Coordinates	46°32′4″N 122°25′43″W / 46.53444°N 122.42861°W / 46.53444; -122.42861[1]
Type	reservoir
Primary inflows	Cowlitz River
Primary outflows	Cowlitz River
Catchment area	1,400 sq mi (3,630 km2)[2]
Basin countries	United States
Max. length	23.5 mi (37.8 km)[2]
Surface area	11,830 acres (47.9 km2)[3]
Max. depth	360 feet (110 m)
Shore length1	52 mi (83.7 km)[2]
Surface elevation	778.5 ft (237 m)[2]
References	[1][2][3]
1 Shore length is not a well-defined measure.

Riffe Lake is a long reservoir on the Cowlitz River in the U.S. state of Washington. The 23.5 mi (38 km) lake was created by the construction of Mossyrock Dam, the tallest dam in the state,^[4] in 1968 by Tacoma City Light (now Tacoma Power).^[2] Riffe Lake includes 6 islands, 3 of which being incredibly small, sandy islets, and one being a tidal island. None of them have names.