Coming April 22, 2006 is the Rosarito to Ensenada Fun ride. It is reported to be even bigger than the LA Bike Tour. It is reported to have the wackiness of critical mass and Midnight Ridazz rides. People dress themselves and their bikes in whimsical costumes.
The views are reported to be spectacular. And from what I understand, the bikes do take over these streets of the Rosarito to Ensenada bike ride.
It is probably the biggest Critical Mass rides, of sorts on the whole north American continent.
And Skaters also ride the Rosarito to Ensenada bike ride(see picture and report).
Rosarito Beach to Ensenada bike ride
In a day or two there will be a local report with a Mexican bicycle flavor.