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Detroit Critical Mass

5042 Trumbull Ave, Detroit, MI 48208, USA   Get Direction


The Detroit Critical Mass is a grassroots protest ride that happens every last Friday of the month year round. Rides start just west of the Wayne State University campus @ Warren & Trumbull. During the warmer months, the rides usually last about 2 hours and the pace is around 12-15mph. 


The original Critical Mass rides started in San Francisco sometime in the early 90s as a fast-paced word-of-mouth inner city urban ride. It was seen as a cool way for locals to ride their bikes with the traffic as a group.

Since then the concept of Critical Mass caught on in more than 250 cities worldwide. The rides often draw in hundreds, even thousands, of riders. Together all riding on the last Friday a month worldwide.

Detroit Critical Mass really started catching-on sometime in '07 with a small group of local riders. The location later had to be switched to accommodate the growing number of cyclists and parking needs.

During the warm months Detroit Critical Mass often pulls in enough riders to cause traffic jams for several blocks at a time. A lot of people stop to gawk, honk their car horns, cheer, or wave their fist and grimace. It's really a cool sight, everyone loves it.

The Critical Mass motif is intended as a non-formal road-biking-rights exercise.It can either be seen as a reminder to motorists that bikers can and will ride the roads, or it can be seen as a quarky fun thing to do in Detroit.

During any one of the rides there may be several leaders that chart the ride and it's location. The average distance is around 25 miles. There's a bunch of stops along the way that allows riders to catch-up or "Mass-up." The average speed is around 13mph and it'll take up about 2 hours of your time.

The bottom line is it's fun and it's free. If you like people watching, getting some miles in, spotting cool bikes or showing off your cool bike, socializing and sight-seeing in Detroit, you'll probably like this ride.

  • Formal Events
  • Warren and Trumbull, Detroit
    5042 Trumbull Ave, Detroit, MI 48208, USA
What To Look For
  • Ride for everyone

    Ride along with pros & casual riders.

  • Road Riding

    For experienced riders.

  • 7PM start time

    Meetup at 6:30

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