Lake Armstrong is a 30.8 acre lake located 2.5 miles north of Arlington. It has an average depth of 15 feet and a maximum depth of 24 feet. The watershed, or the land area that drains into the lake, covers 434.4 acres and is mostly undeveloped. Lake Armstrong provides a serene setting with one of the least developed shorelines in the county.
- Boat Launch
- Boating (No gasoline-powered motors)
- Lake Access
Fishing InformationThe 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.
Lake Armstrong does not have a formal lake association. However, you may be able to connect with other lake area residents by looking for a Lake Armstrong community group on NextDoor or Facebook.
Connect with Your Lake Community
Lake Health and Additional ResourcesAs part of Snohomish County's Lake Management Program, County staff and volunteer lake monitors have been tracking the health of Lake Armstrong since 1992.
|Health Report Card
|In Depth Health Report
For more historical information on Lake Armstrong please refer to the 2003 State of the Lakes Report.
MapsView maps of Lake Armstrong and the surrounding area, including the location of public access sites.
Depth contours of the lake
Depth contours of the lake with satellite images