Depends on your locality, biking on sidewalks and trails is perfectly legal here: https://www.seattle.gov/transportation/projects-and-programs/programs/bike-pro

Depends on your locality, biking on sidewalks and trails is perfectly legal here: https://www.seattle.gov/transportation/projects-and-programs/programs/bike-program/rules-of-the-road https://www.seattle.gov/transportation/projects-and-programs...