Mountains-to-Sea Trail is a hiking trail in Watauga County, North Carolina. It is within Blue Ridge Parkway. It is 3.6 miles long and begins at 3,781 feet altitude. Traveling the entire trail is 0.7 miles with a total elevation gain of 141 feet. Thunder Hill Overlook and another viewpoint and the Craig Cemetery (elevation 3,816 feet) grave yard are near the trailhead. There are also parkings. Thunder Hill (elevation 3,799 feet) and Raven Rock (elevation 3,839 feet) can be seen along the trail.