Tres Amigos is a red-blazed trail that starts as a short climb straight through pure boulders that only the fittest and most technically skilled riders will clear. Once at the top, look to the left and right off the side of the trail for the best sections of the whole system. The trail is known for its features onto and off of smooth boulders that are set off to the side of the trail.
Although I mapped this one from the Ridge Trail
(white square) to the pipeline, it is great ridden the opposite direction as well. The trail has completely different lines going in different directions. Whenever I ride at Sourlands, I'll ride Tres Amigos in both directions because of the uniqueness of the trail.
Enjoy, and bring your tech skills!