{{Short description|Lake in Washington state, U.S.}} {{Use American English|date=July 2025}} {{Use mdy dates|date=February 2025}} {{Infobox body of water | name = Lake Mayfield | image = File:Mayfield Dam and Lake Mayfield - Cowlitz River - Washington State 01.jpg | caption = Lake Mayfield and Mayfield Dam | image_bathymetry = | caption_bathymetry = | location = {{nowrap|Lewis County, Washington, U.S.}} | coords = {{Coord|46|30|14|N|122|35|19|W|type:waterbody_region:US-WA|display=inline,title}} | type = reservoir | inflow = Cowlitz River, Tilton River | outflow = Cowlitz River | catchment = | basin_countries = United States | length = | width = | area = | depth = | max-depth = | volume = | residence_time = | shore = | elevation = {{convert|abbr=on|427|ft|m}} | islands = 1, Harold Freece Island | cities = <!-- Map --> | pushpin_map = Washington#USA | pushpin_label_position = | pushpin_map_alt = Location of Lake Mayfield in Washington, USA. | pushpin_map_caption = <!-- Below --> | website = | reference = }} '''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.
==History== The '''Mayfield Dam''' was constructed in 1963 as a concrete arch and gravity dam. At {{convert|250|ft}} high and capable of generating 162 megawatts, it supplies Tacoma Power with a large percentage of its entire hydroelectric power supply, second only to Mossyrock Dam.<ref>{{cite web |url=http://www.mytpu.org/tacomapower/power-system/hydro-power/cowlitz-river-project/mayfield-dam.htm |url-status=dead |archive-url=https://web.archive.org/web/20110103050205/http://www.mytpu.org/tacomapower/power-system/hydro-power/cowlitz-river-project/mayfield-dam.htm |archive-date=2011-01-03 |title=TPU Power Mayfield Dam}}</ref>
==Environment and ecology== The lake is home to tiger muskies. Tiger muskies were introduced in 1993 to help control northern pikeminnow (squawfish) populations.<ref name="ML">{{cite web |title=Mayfield Lake |url=https://wdfw.wa.gov/fishing/locations/lowland-lakes/mayfield-lake |publisher=Washington Department of Fish and Wildlife |access-date=June 18, 2025}}</ref> In 1997, after an act of vandalism that destroyed a bald eagle nest near the lake, an artificial nest was built with help from a Boy Scout troop from Shoreline.<ref>{{cite news |title=Eagles Watch Humans Replace Vandalized Nest |url=https://infoweb.newsbank.com/apps/news/document-view?p=NewsBank&docref=news/0EB538B5857A462D |access-date=June 18, 2025 |work=The Seattle Times |date=February 2, 1997 |page=B1 |id={{NewsBank text|0EB538B5857A462D}} |via=NewsBank |url-access=registration}}</ref>
==Recreation== The Cowlitz River Arm is significantly colder than the rest of the lake due to its proximity to the Riffe Lake which is created by Mossyrock Dam. The water from Riffe Lake flows through the Mossyrock Powerhouse's two hydroelectric generators. The Tilton River arm is much warmer and shallower due to past landslides. Ike Kinswa State Park is located on a peninsula bounded by the Cowlitz River and the Tilton River.<ref>{{cite web |url=http://www.stateparks.com/ike_kinswa_state_park_in_washington.html |title = Ike Kinswa State Park, a Washington State Park}}</ref> The lake contains an island with a lighthouse.
Throughout the 1980s and 1990s, there were many water ski and wake board tournaments held on the lake's Winston Creek arm where the Lake Mayfield Resort is located. The Mayfield Lake Youth camp is located up the Winston Creek arm adjacent to the Winston Creek Falls.<ref>{{cite web |url=http://wdfw.wa.gov/fishing/washington/750/ |title = Lowland lakes {{!}} Washington Department of Fish & Wildlife}}</ref>
==See also== {{Portal|United States|Water|Renewable energy}} * List of dams in the Columbia River watershed * List of geographic features in Lewis County, Washington * List of lakes in Washington
== References == {{commons category-inline|Lake Mayfield}} {{reflist}}
{{authority control}}
Mayfield Mayfield Category:Protected areas of Lewis County, Washington Category:Tacoma Public Utilities