Lake Mayfield
| Lake Mayfield | |
|---|---|
Lake Mayfield and Mayfield Dam | |
| Location | Lewis County, Washington, U.S. |
| Coordinates | 46°30′14″N 122°35′19″W / 46.50389°N 122.58861°W |
| Type | reservoir |
| Primary inflows | Cowlitz River, Tilton River |
| Primary outflows | Cowlitz River |
| Basin countries | United States |
| Surface elevation | 427 ft (130 m) |
| Islands | 1, Harold Freece Island |
Lake Mayfield is a reservoir located near Mossyrock, Washington, in Lewis County. It was created by Mayfield Dam on the Cowlitz River, one of the dams in the Columbia River watershed.