Inland Empire, Los Angeles, Orange, if you haven't been on this trail, this is a must! Simply because it is very easy to access and so very close!
Just north of Devore (North of Fontana), exit 15 Fwy at Cleghorn Rd. Parking right at trailhead, fairly nice and easy ride. However, plenty of side trails with rocky, steep and rutted challenges. There are miles and miles of additional trails able to ride to Lake Arrowhead, Gregory and all the way to Big Bear Lake, beautiful ride....
You can purchase Wilderness pass ($5 daily, or $30 annual) at Chevron Station at the Hwy 138 Exit (approx 1/2 mi north). Trying to post photos of the ride.