Some of the mountains are developed for skiing and other snow-related activities. Others have hiking trails for use in summer.[8] Mansfield, Killington, Pico, and Ellen have downhill ski resorts on their slopes. All of the major peaks are traversed by the Long Trail, a wilderness hiking trail that runs from the southern to northern borders of the state and is overlapped by the Appalachian Trail for roughly ​1⁄3 of its length.