The Appalachian Trail, after traversing Iron Mountain to the west, crosses Hughes Gap and ascends Roan's northern slope to Tollhouse Gap. From there, it makes a sharp turn to the east, crossing Roan High Knob, Carver's Gap, Grassy Ridge, and Yellow and Little Hump Mountains before descending to US-19 and the White Rocks Mountain area. From the slopes of Old Black in the Great Smoky Mountains, some to the south, to Mount Washington in the White Mountains of New Hampshire, some to the north, Roan Mountain is the only area where the trail rises above the mark.