Sunday Lake

Sunday Lake is located five miles east of Stanwood on a plateau north of the Stillaguamish River. The lake is 48.6 acres in size and quite shallow, with a maximum depth of 20 feet. The Sunday Lake watershed, or the land area that drains into the lake, is mostly undeveloped and covers 851.3 acres.

Recreational Opportunities

  • Boating (No gasoline-powered motors)
  • Fishing
  • Lake Access
There is public fishing access and walk-in boat launch on the north side of the lake as shown on the bathymetric maps below. Internal combustion motors are not allowed on Sunday Lake - see Snohomish County Code Title 12 and the Parks and Recreation Boating Regulations for more information.

Fishing Information

The Washington Department of Fish and Wildlife (WDFW) maintains informational pages for each lake in Washington that include: fish stocking schedules, fishing prospect calendars, and boat launch information.

Connect with Your Lake Community

Sunday Lake has a formal association for residents living on the southeast side of the lake called the Sunday Lake Community Club. The club is dedicated to developing community and protecting the lake and can be contacted by email. You can also connect with the larger lake community by searching for a Sunday Lake community group on NextDoor or Facebook.

Sunday Lake Algae Control Plan

Snohomish County developed this plan in 2019 incoordination with community members in response to ongoing concerns of lake health. The goal is to provide the community with a road map to reduce phosphorus pollution, the underlying source of toxic algae blooms to the lake. Included in the plan are:

  • Sunday Lake’s water quality history
  • Major sources of phosphorus to the lake
  • Options to reduce pollution and reduce toxic algae
  • Cost estimates and benefits of each option
  • Steps the community could take to implement the plan
The community provided input into a draft plan which was integrated into the final plan including a Summary of Community Feedback.and the county's response to Frequently Asked Questions  from the community. 

Lake Health and Additional Resources

As part of Snohomish County's Lake Management Program, County staff and volunteer lake monitors have been tracking the health of Sunday Lake since 1990. 

Health Report Card

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In Depth Health Report

In Depth Lake Health Report

​For more historical information on Sunday Lake please refer to the 2003 State of the Lakes Report.
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View maps of Sunday Lake and the surrounding area, including the location of public access sites.

Watershed Map
Area that drains to the lake

Bathymetry Map
Depth contours of the lake

Aerial Bathymetry Map
Depth contours of the lake with satellite images
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