Yeah, there is great riding around here. Im in Danville, and while Im mostly a Downhiller, I get the occasional XC ride in. In the Las Trampas hills, there are some pretty good loops, and some fun (illegal) trails. Diablo is pretty fun when its dry, otherwise the dirt is like cement if it dries on your bike before you can wash it off. The best time to ride Diablo is when the dirt is mostly dry, but just rained on enough to keep the dust down. I work at a shop in Downtown Danville called California Pedaler. Come by and check us out!