Mac's Gap is 3.1 miles long one-way and composes some of the best singletrack in the valley. It is a very diverse trail, with some wide-open gradual descents, fast raucous bombs, deep creek crossings, climbs... you get the picture, it offers a little bit of everything! It connects from the Cold Mountain trailhead and heads to the west past both Big Green Mountain and Little Green Mountain, connecting to numerous other trails along the way. It is the main bike conduit in the southern portion of the valley, so if you are going to build a big loop you will need to utilize this trail.