Washington /

Blackmans Lake

Lake in Washington · 68 acres · near Northwest Snohomish

Aerial view of Blackmans Lake, August 2017
Aerial view of Blackmans Lake, August 2017 Photo: USDA Farm Service Agency, NAIP · Public domain · via USGS The National Map

Blackmans Lake is a 68-acre lake near Northwest Snohomish in Washington, with 1 public boat ramp listed here. The deepest point is about 25 feet.

Past algal blooms

Harmful algal blooms reported on this water (state reports compiled by U.S. EPA): 2017, 2019 and 2020.

state reports compiled by U.S. EPA · checked October 20, 2026

Depth contours in feet from Washington Ecology; deepest point about 25 ft. Lake levels and bottoms change; not for navigation.

Boat launches on Blackmans Lake

Wikidata: Q26837246