L.A.'s Mountain Biking Trails Bonelli Regional Park Click Here for Map Exit the 210 at Via Verde and park at the "Park and Ride". Head east toward the park and the trail begins on your right before you actually enter the park. This trail has a good variety of fireroads and singletrack. It makes a loop around Bonelli Park in the hills of San Dimas. Beginner to Advanced Current Trail Rating = 8 Click Here to Rate this Trail Click Here to Return to Trails Home