Hike to South Twin Mountain and back:
4902 feet high (3400 feet up)
11 miles 8 hours (difficult)
via North Twin Trail
Just hiking up:
5 1/2 miles 4 1/2 hour
Hike List: NH 4000-Footers
Guide: AMC White Mountain Guide
Website: AllTrails
Alternate Hike (just nearby Galehead):