Hiking in the White Mountains is coordinated by the Appalachian Mountain Club or “AMC” (outdoors.org), whose chain of information centres, hostels and huts along the Appalachian Trail, traversing the region from northeast to southwest, is detailed here. Call t 603 466 2721 for trail and weather information before you attempt any serious expedition.
Downhill and cross-country skiers can choose from several resorts that double up as summertime activity centres. The Waterville Valley Resort (603 236 8311, waterville.com) and Loon Mountain (603 745 8111, loonmtn.com), both just east of I-93, are good for downhill, while Jackson (603 383 9355, jacksonxc.org), about fifteen miles north of Conway on Rte-16, has some of the finest cross-country skiing trails in the northeast. General information on the skiing centres is available from Ski NH (603 745 9396, skinh.com).
In the summer, the cross-country skiing trails can make for strenuous but exhilarating biking (you can take lifts up the slopes and ride back down). Both Waterville and Loon have bikes for rent on site for around $34 per day; Loon also runs a zip-line ($26).