Duwamish River
River in Washington · 543 acres · near Duwamish, Seattle, White Center
The Duwamish River is a 543-acre river near Duwamish, Seattle and White Center in Washington, with 2 public boat ramps and 1 carry-in launch listed here.
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 Duwamish River 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.
Channel depths in feet from the Army Corps' surveys of February 10, 2026. Not for navigation.
Channel surveys
- Duwamish Waterway
Condition survey of February 10, 2026 by the Seattle District. Least depth in the channel: 0.6 ft below mean lower low water (MLLW); project depth 20 ft. Survey sheet (PDF)
US Army Corps of Engineers hydrographic surveys, from eHydro. A survey shows the bottom on the day it was made; channels shoal after high water and change with dredging. Not for navigation.
Boat launches on the Duwamish River
- 1st Avenue South Bridge Boat Launch · Boat ramp · near Seattle
- Diagonal St South Pacific Access · Carry-in (canoe and kayak) · near Seattle
- Duwamish Gardens hand-carry boat launch · Boat ramp · near Duwamish
Community
Where people who fish, boat and paddle Duwamish River talk about it. Lake associations, clubs and local groups will be added as we find them.
Wikidata: Q751663