I pretty new to mountain biking. I used to ride a few years back but just getting back into it. I'm hoping to stick to it and maybe even race in the future. I live in Rancho Cucamonga if anyone knows any trails nearby let me know. Thanks
:welcome: from San Dimas. Try going up Mills ave to Claremont Wilderness. It's a fire road type ride but has all kinds of riding that branches off of it.
:welcome: from Ontario! Sycamore Canyon Wilderness Park in Riverside is about 20 - 30 minutes from Rancho (in no traffic, that is). I pimp it out constantly because there is something for all skill levels there. There is also Marshall Canyon in Claremont (if you like climbing). And Southridge in Fontana for all your gravity defying needs
:welcome: from Oak Hills. As others suggested, Marshall Canyon or Claremont Wilderness would be my first recommendation for starters.