A Kidical Mass bike ride is a large group ride for kids of all ages, family members, and supporters. We choose an easy route that anyone can ride, and we ride as a pack for safety and fun. Our rides sometimes end with treats of some kind and always with time to hang out. While everyone rides at their own risk, we have guides to help keep the group together and block traffic at intersections.

Anyone. The rides are free. All are welcome. The rides have an easy pace and are "no drop" rides, meaning no one will be left behind.

East Bay Kidical Mass has led rides ranging from 2 - 5 miles in Berkeley, Emeryville, and Oakland, California.

We look forward to expanding our range to other East Bay cities.

The first known Kidical Mass ride in the US was held in April 2008 in Eugene, Oregon and rides have now spread to over a dozen communities throughout North America and Europe.

The Kidical Mass Wikipedia page lists several other Kidical Mass rides in other states and countries.

The best way to help is to spread the word. Let your school or community know about the ride. We also welcome people who want to help guide the ride. Write to marc@precipice.org with any questions or to volunteer to help.

As consideration for being allowed to participate in East Bay Kidical Mass, all participants are deemed to have released from liability and waived any right to sue its organizers, their employees, officers, volunteers and agents from any and all claims, including claims of negligence, resulting in any physical injury, illness (including death) or economic loss suffered as a result of participating in this East Bay Kidical Mass. By participating in a East Bay Kidical Mass event, each participant understands that there are risks, such as physical and/or psychological injury, pain, suffering, illness, disfigurement, temporary or permanent disability, death or economic loss. These injuries or outcomes may arise from a participant’s or other’s actions, inactions, or negligence, or the condition of the location(s) or facility(ies). Nonetheless, participants assume all known and unknown risks of participation in East Bay Kidical Mass.