With a vast supply of public parkland, Los Angeles has plenty of trails to keep diehard mountain bikers satisfied. Several of the parks that are good for hiking, like Malibu Creek State Park, Coldwater Canyon Park and Griffith Park, also have specific trails for mountain bikers. Most of these trails close at dark and can get crowded when the weather is nice. A good resource for finding biking trails in the Santa Monica Mountains near your home is www.lamountains.com, which provides a biking trail locator in which you input your zip code and the trails closest to you are displayed. For those looking for a group to ride with, www.bicyclela.org is a good place to start your search. Over The Bars Mountain Bike Club (www.otbmbc.com) sponsors weekly group rides that are free to attend and open to anyone with an interest in mountain biking.