Critical Mass is not an organization, it's an unorganized coincidence. It's a movement... of bicycles, in the streets.

The Critical Massers in Santa Cruz meet up at about 5:30 at the Town Clock the last Friday of every month.

In January, bikepower put out the following call for revolutions in the streets, "Come on the Critical Mass monthly bike ride! reclaim your street and your city from the automorphs, its time for a party ride!"