This is the most technical ride in the Red Fleet area; you will encounter plenty of tight, narrow trail, sudden ups and downs and plenty of rocks of all varieties. After climbing a short way from the road, the be sure to follow the bank right rather than continuing up the old Three Amigos Trail. . The trail will merge with Handsome Cabin Boy for a while and then you need to look for the left fork branching away from HCB (signed, but you have to look for it). At that point, it's quick, semitechnical descent back to the road. Cross the road at the restrooms and start up the singletrack. Very shortly thereafter, the hiking only Dino Tracks trail peels left and J-Boy goes right. Get ready for a long, switchbacky climb to the top of rock ledge rising hundreds of feet above the valley. At the top of the climb, get ready for an extended, technical descent that will throw a little bit of everything at you. Once at the bottom of the descent, its a moderate climb up the sandy wash to the road at the Jass Chrome Moly trailhead. The J-Boy Trail makes for a perfect advanced loop completion after the Jass trail.