The official May Day march will gather at Judkins Park in the Central District of downtown Seattle at 3pm.
Marchers will continue north on 20th Avenue South, then turn west on S. Jackson Street, north on Boren Avenue, and west onto Madison Street.
It will then finish north on Fourth Avenue toward Pine Street until it ends at Westlake Park where a rally is planned for 5pm. It may last an hour or more depending on how crowds respond to the sunny and warm weather predicted all day Thursday.
The rally will likely shut down 4th Avenue during rush hour, and drivers should expect heavy congestion. Bus riders may also see their routes interrupted or delayed throughout the afternoon and evening.