Participants ride from Glendale to Castaic Lake, where the event culminates in a giant party and concert.

Participants rode through the center of barns, along creek banks, and through pastures-most of which have now disappeared under various housing developments.

Participants ride standard bodyboards in the prone or kneeling position.

Participants ride an average of about 70 miles per day.

Participants ride Yellowstone's snowcoaches, cross-country ski and snowshoe to learn about wildlife and geology.

Participants may ride for 15, 25 or 50 miles.

Participants ride from inn to inn.

Participants met astronauts at launch sites, such as Cape Kennedy, or rode helicopters to observe the pickup of astronauts.

Participants in a global no trousers day flashmob ride the London underground on Sunday.

Participants in a No Trousers Day flashmob ride the London Underground with other tube passengers.