Starting from its southern extent, Crestline Trail is carved out of the rock ledges of the east side of Scout Mountain. There are some rocky sections and climbs as you run along the exposed edge that will get your adrenaline pumping. As you approach the northern end, the trail wraps over itself and heads west. It's all downhill from here as you wind through the forest. There are some more rocky sections but also buttery smooth sections; though they often change rather abruptly.