To access the 9.6-mile Dry River Trail, head north from Bartlett (about 4 hours north of Boston) on NH 302 and drive 9 miles. Experienced winter hikers might consider a rugged 16.6-mile trip that climbs to Lake of the Clouds via the sky-high Crawford Path and returns along the Dry River Trail.
January through February, during the wee hours of the night.
White Mountain Guide, 26th ed., by Gene Daniell and Jon Burroughs (Appalachian Mountain Club Books, 800-262-4455; www.outdoors.org; $21.95).
Ammonoosuc Ranger District, White Mountain National Forest, (603) 869-2626.