Lake Union
Lake in Washington · 646 acres · near Seattle
Lake Union is a 646-acre lake near Seattle in Washington, with 1 public boat ramp and 1 carry-in launch listed here. 1 launch is listed as free.
Washington State Department of Ecology lists this water as likely to contain New Zealand mudsnails; extra decontamination is advised when leaving it. Clean, drain and dry your boat, trailer and gear before you leave, and do not move water, plants or live bait to another water.
Washington State Department of Ecology · checked October 20, 2026
Boating rules
- No-discharge zone: WAC 173-228 bans vessel sewage discharges, whether treated or not, in the No Discharge Zone. It became effective May 10, 2018. · all of Lake Union rule
From the boating rules map of Washington Department of Ecology, read October 20, 2026. A map of rules is a guide: the regulation's text and the posted signs govern.
Boat launches on Lake Union
- Sunnyside Avenue North Boat Ramp · Boat ramp · near Seattle
- Waterway 23 Boat Launch · Carry-in (canoe and kayak) · near Seattle · free
Community
Where people who fish, boat and paddle Lake Union talk about it. Lake associations, clubs and local groups will be added as we find them.
Wikidata: Q1993203