Critical Mass Seattle
Seattle, WA · Critical Mass · Social
- When
- Last Friday of the month, 6:30 pmYear-round
- Starts at
- Westlake Park, 401 Pine St, Seattle, WA 98101 Map ↗
- Hosted by
- Critical Mass SeattleCommunity-run
- Kind of ride
- SocialCritical Mass
For visitors
Open to anyone. Bring lights. The ride's own posts are on Instagram.
First time on this ride? Here’s the drill
- Bring
- a helmet, front and rear lights (it's a dark-hours ride), water, a spare tube or patch kit, a way to pay for the stop.
- Arrive
- Ten or fifteen minutes before the meet time. Tell whoever's leading that you're new.
- Pace
- Pace isn't posted. Ask the host before you go, or say you're new when you arrive.
- Check
- Look at @critical_mass_seattle the day of — that's where cancellations, weather calls and start changes get posted.
First group ride? Start here →
About the Critical Mass Seattle group ride
Critical Mass Seattle is a Critical Mass ride in Seattle, WA. It rolls last Friday of the month at 6:30 pm from Westlake Park.
The monthly Seattle Critical Mass starts at Westlake Park. The route is decided on the night. It usually has three legs: a start at Westlake, a grocery stop, and a finish at a park such as Golden Gardens or Discovery Park.
Where to find them
The town
Riding Seattle from out of town?
Where the routes are, who fixes or rents a bike, where to sleep with it, how to get it here.
Checked Oct 2, 2026 against source 1, source 2. Schedules change. Confirm with the host before you go.