Where to Bike Los Angeles Mountain Biking: Best Mountain Biking around Los Angeles (Where to Bike (BA Press))
21 - Las Llajas Canyon - Chumash LoopThis is both a great ride for beginners  (first three miles out and back) and experienced riders alike. The loop as described here is relatively short but offers quite a bit of diversity, pleasant canyon with oak-studded canopy, steep climbs, fast open descents, and moderately technical singletrack. For long-distance riders, you can add plenty of mileage by incorporating Roacky Peak Road, Johnson Motorway, and Hummingbird Trail.