From the gate, head up the fire road for about 3 miles to the plateau. From here you will see some singletrack options. The trail to your left will bomb you straight back down to your car. This trail, Moonscape, offers switchbacks, smooth hardpack, ruts, loose rocks and lots of fun. Once at the bottom, you will hit a street. Head west and back to Glendora Mtn. Road.
How to get there:
Take HWY 210 to Glendora. Exit at Lone Hill and go North to Foothill. Turn left onto Foothill to Valley Center. Turn right onto Valley Center. Valley Center changes into Siera Madder. As soon as it changes, turn right onto Glendora Mountain Road. At the first sharp turn in the road you will see a gate to the right. This is the trailhead.