Lake Riley

Lake Riley is a bog lake located in the Cascade Mountain foothills about 10 miles northeast of Arlington. The lake is 32.8 acres in size, with a maximum depth of 45 feet and an average depth of 22 feet. The watershed, or the land area that drains into the lake, is relatively small. It measures 183.8 acres, and is largely undeveloped.

Recreational Opportunities

  • Boat Launch
  • Boating (No gasoline-powered motors)
  • Fishing
  • Restrooms/Sanicans
There is a public boat launch on the south side of the lake. Internal combustion motors are not allowed on Lake Riley - 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

Lake Riley does not have a formal lake association. However, the majority of homes on the lake are part of the Normanna Park, which is owned and maintained by members of the Normanna Sons of Norway. You can learn more at their website.

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 Lake Riley since 1994. 

Health Report Card

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In Depth Health Report

In Depth Lake Health Report

​For more historical information on Lake Riley please refer to the 2003 State of the Lakes Report.
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View maps of Lake Riley 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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