Lake Wilderness Park

Maple Valley, Washington

At 117 acres, Lake Wilderness Park is a large regional park with lots of prime shoreline, preserved forestland, and meandering pathways.

Running through the middle of Lake Wilderness Park is Jenkins Creek, a tributary for Big Soos Creek, which empties into the Green River. The park also includes three wetlands. A variety of birds and animals also make their home in Lake Wilderness Park, including deer, beaver, raccoon, hawks, wrens, and ruffed grouse.

Annual events held in Lake Wilderness Park include: Fishing Derby & Fishermen's Breakfast, Maple Valley Days, Music in the Park, 4th of July Celebration with Fireworks, Kid's Festival and Family Concert, and Outdoor Movie Under the Stars.

Amenities
Lake Wilderness Park 3A children's play area with swings and play structures
Picnic tables and barbecues
Three picnic shelters (available for rental)
Five picnic sites (available for rental)
Two outdoor tennis courts
A softball field (available for rental)
Walking paths and large grassy areas that can be used for a variety of activities, such as Frisbee or a game of catch
Swim beach with seasonal lifeguards, boat rentals and a concession stand. For more information about these summer programs please click here.
Summer swimming area; for more information regarding Lake Wilderness click here
Fishing (licensing information is available at the Washington State Department of Fish and Wildlife site).
Boat launch (internal combustion engines prohibited)
Access to Green to Cedar Rivers Trail which connects to the Cedar River Trail

COVID-19

Keep your distance from other people.

Practicing social distancing is essential right now. Follow the advice of the health experts. If your community has asked that you remain indoors and away from others, do so. Heading to the beach should only be considered an option if social distancing practices can be followed. Spending a day in any crowded place is the worst thing we can do for our most vulnerable right now and will counter the efforts to curb the virus’ spread.

For more information, please visit the World Health Organization public resource on COVID-19.

Water Quality
  • Meets water quality standards

  • Current Status
  • This status is based on the latest sample, taken on May 26th, 2020. King County Department Natural Resources and Parks updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on May 28th, 2020 at 6:43 PM.
For water quality icon legend, click:  
Monitoring Frequency

Lake Wilderness Park is sampled weekly from May 5th from September 21st.

Source Information

The King County Department of Natural Resources and Parks monitors water quality at designated swimming beaches in the county from May to September. Water quality data is collected weekly, usually on Mondays. Results are generally posted to the King County Swimming Beach Bacteria Monitoring page by noon on Wednesday.

During the sampling period, Puget Soundkeeper Alliance regularly updates the Swim Guide to reflect the most current information. Local health officials use the following protocol to make closure determinations – A day’s average E. coli value is over 1000 CFU/100 mL – OR - The average of the E. coli values for the three most recent sampling days is over 200 CFU/100 mL. The three-day average is calculated using the geometric mean (geomean). The unit of measure is a CFU which stands for Colony Forming Units. A beach is marked Green (open) when both of these protocols are met. A beach is marked Red (closed) when these criteria are not met and the public health officials have closed the beach. A beach may also be marked Red if there is a Harmful Algal Bloom (HAB) reported at the beach. A beach is marked Grey when current water quality data is not available. The King County Water and Land Resources Division (WLRD) collects and analyzes the samples. Public Health Seattle & King County is alerted when bacteria or state algal toxin thresholds are exceeded and determines the health and safety implications of the bacteria and algal toxin data collected, and they work with King County WLRD and the local park manager to post an advisory. For more information go to King County Swimming Beach Bacteria Monitoring website: kingcounty.gov/swimbeach.

Water Quality Graph

Lake Wilderness Park

Maple Valley, Washington

COVID-19

Keep your distance from other people.

Practicing social distancing is essential right now. Follow the advice of the health experts. If your community has asked that you remain indoors and away from others, do so. Heading to the beach should only be considered an option if social distancing practices can be followed. Spending a day in any crowded place is the worst thing we can do for our most vulnerable right now and will counter the efforts to curb the virus’ spread.

For more information, please visit the World Health Organization public resource on COVID-19.

Water Quality
  • Meets water quality standards
  • Current Status
  • This status is based on the latest sample, taken on May 26th, 2020. King County Department Natural Resources and Parks updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on May 28th, 2020 at 6:43 PM.
For water quality icon legend, click:  

At 117 acres, Lake Wilderness Park is a large regional park with lots of prime shoreline, preserved forestland, and meandering pathways.

Running through the middle of Lake Wilderness Park is Jenkins Creek, a tributary for Big Soos Creek, which empties into the Green River. The park also includes three wetlands. A variety of birds and animals also make their home in Lake Wilderness Park, including deer, beaver, raccoon, hawks, wrens, and ruffed grouse.

Annual events held in Lake Wilderness Park include: Fishing Derby & Fishermen's Breakfast, Maple Valley Days, Music in the Park, 4th of July Celebration with Fireworks, Kid's Festival and Family Concert, and Outdoor Movie Under the Stars.

Amenities
Lake Wilderness Park 3A children's play area with swings and play structures
Picnic tables and barbecues
Three picnic shelters (available for rental)
Five picnic sites (available for rental)
Two outdoor tennis courts
A softball field (available for rental)
Walking paths and large grassy areas that can be used for a variety of activities, such as Frisbee or a game of catch
Swim beach with seasonal lifeguards, boat rentals and a concession stand. For more information about these summer programs please click here.
Summer swimming area; for more information regarding Lake Wilderness click here
Fishing (licensing information is available at the Washington State Department of Fish and Wildlife site).
Boat launch (internal combustion engines prohibited)
Access to Green to Cedar Rivers Trail which connects to the Cedar River Trail

Monitoring Frequency

Lake Wilderness Park is sampled weekly from May 5th from September 21st.

Source Information

The King County Department of Natural Resources and Parks monitors water quality at designated swimming beaches in the county from May to September. Water quality data is collected weekly, usually on Mondays. Results are generally posted to the King County Swimming Beach Bacteria Monitoring page by noon on Wednesday.

During the sampling period, Puget Soundkeeper Alliance regularly updates the Swim Guide to reflect the most current information. Local health officials use the following protocol to make closure determinations – A day’s average E. coli value is over 1000 CFU/100 mL – OR - The average of the E. coli values for the three most recent sampling days is over 200 CFU/100 mL. The three-day average is calculated using the geometric mean (geomean). The unit of measure is a CFU which stands for Colony Forming Units. A beach is marked Green (open) when both of these protocols are met. A beach is marked Red (closed) when these criteria are not met and the public health officials have closed the beach. A beach may also be marked Red if there is a Harmful Algal Bloom (HAB) reported at the beach. A beach is marked Grey when current water quality data is not available. The King County Water and Land Resources Division (WLRD) collects and analyzes the samples. Public Health Seattle & King County is alerted when bacteria or state algal toxin thresholds are exceeded and determines the health and safety implications of the bacteria and algal toxin data collected, and they work with King County WLRD and the local park manager to post an advisory. For more information go to King County Swimming Beach Bacteria Monitoring website: kingcounty.gov/swimbeach.

Water Quality Graph

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