I went to Four Corners/Corral Canyon this weekend. Pretty fun! There were quads and bikes buzzing aorund at 30 -40 mph, jeeps going 10-15 mph, and we were tooling along at 30-50 mph. Mostly smooth trails, some rocks, a little gravel, lots of elevation change. It's off I-8, Buckman Springs exit, then another 10 mi south.