List of organized bicycle rides in Northern California, covering the San Francisco Bay Area, Santa Clara, Alameda, Contra Costa, Marin, Sonoma, Napa, Mendocino and Sacramento counties. www.bikecal.com
Global positioning system waypoints, routes, tracks, and maps of singletrack biking trails in Northern California. Resources include a world directory of MTB sites with GPS data and a review of GPS cartography software. www.iron-horse.us/mtb
Southern California mountain biking trail information for Orange County, Big Bear Lake, San Diego, and Sedona areas. Includes maintenance tips and retail gear. www.bikingdestinations.com
Cycling time trial racing information guide for Southern California. Includes information, news, aerodynamics data, race calendars and course information, product reviews, training tips and schedules, bike photo gallery. www.timetrial.org
Information and news of interest to tandem bicycle teams. Calendar of events in the U.S. Roster of tandem clubs in the world. tandemstuff.homestead.com
Clickable map of Los Angeles and northern Orange County showing all Class I bike paths, with links to a close-up of each one, including mileage, map, photos. www.labikepaths.com
Fundraiser ride for the J. Benjamin Eckenhoff Fund for Research in Hematology, established to support research in chronic lymphocytic leukemia and associated autoimmune diseases. Includes history and sponsored research information. www.benride.org
Photo gallery and ride guides for Northern California rides in the San Joaquin, Calaveras, Tuolumne, El Dorado and Sacramento County Areas. ogrehut.net
Cycling guide for Humboldt Bay, Northern California. Illustrates bike routes, bus stops, outdoor recreation opportunities, birdwatching sites, bike safety and resources. www.rcaa.org/bikemap
San Francisco's classic bike messenger zine from the early '90s. Bike advocacy, interviews, essays, comics, races, rides, photos, stories from the dynamic bike messenger community of the Bay Area. www.ahalenia.com/merc/index.html