Do you want to challenge yourself mentally and physically? Have you spent too much time on Twitter and need to get out more? Are you simply an adrenaline junkie? If you can answer yes to any of these questions, then this is the group for you. Formed by and for those who love mountain biking. Whether you do it for fitness, for the rush, or to impress maw and paw, you'll get all of that, and then some! Weekly adventures all around the Bay Area. People of all skill levels are welcome. N …

SF A/X: The RIDE stands for San Francisco Active Xplorers of The RIDE. The RIDE is SNOWBOARDING in the Winter and Mountain Biking in the Spring and Summer with some seasonal overlap. SF A/X RIDE events will take place in the Bay Area and Lake Tahoe as well as other areas. SF A/X is linked with two other Meet Up sites: (1) Sactown A/X and (2) Davis A/X. In the Winter, THIS group has the advantage of NETWORKING you with over 400 other very Active SNOWBOARDERS whose home mountains are in TAHOE... …

The BTCEB Meetup.com group was established by the Bicycle Trails Council of the East Bay (www.btceb.org). BTCEB was formed in 1987, and helped create the International Mountain Bicycling Association (IMBA) in 1988. The work of BTCEB is essential in keeping trails open for local mountain biking. By joining BTCEB you'll be supporting grassroots mountain bike advocacy, meet other mountain bikers, and learn about great trails to ride. STAY INFORMED with our weekly electronic newsletter, BTCEB Buzz, …