Monday, September 7 is Labor Day.
King County Metro, Link Light Rail, Sound Transit Express, the South Lake Union Streetcar, the West Seattle Water Taxi, Pierce Transit, Community Transit local buses, Intercity Transit, and Everett Transit will be running on their Sunday schedules.
the Tacoma Link streetcar, the Vashon Water Taxi, Kitsap Transit, Community Transit commuter buses, Skagit Transit, Island Transit, Whatcom Transit, Mason Transit, Jefferson Transit, Clallam Transit, Grays Harbor Transit, and Twin Transit will not be in service.
The Seattle Center Monorail will run 8:30 am – midnight Saturday, August 5 through Labor Day, in support of the huge crowds expected for Bumbershoot.
For Washington State Ferries, check the info on your specific route.