Skip to main content
King County logo

Green Lake
Green Lake is an urban lake located in North Seattle that is surrounded by a city park with swimming areas, docks, play areas, restrooms, a paved trail and other amenities.  Green Lake has fairly clear water with moderate nutrient concentrations and high algal growth.  Non-motorized boats are allowed on the lake, which is stocked with rainbow trout, brown trout and channel catfish.

If you see an algae scum, keep yourself, your children, and your pets out of the algae. Algae scums can produce toxins that are harmful to people and pets. » More info

Green Lake recreation

Swimming beach water quality

Subscribe to water quality alerts or weekly status of freshwater swimming beaches across King County:

Alert    Weekly Status

Green Lake and watershed data

Green Lake watershed area

Source: Green Lake Phosphorus Management Plan (City of Seattle), 2016

Green Lake bathymetric contour map

Green Lake bathymetry map

For questions about lakes in King County, please contact or call the Water and Land Resources Division front desk at 206-477-4800.