A freestyle skier launches off a jump at Waterville Valley Resort, New Hampshire.

A cross-country skier explores a frozen pond in Maine's 100-Mile Wilderness.

A skier descends a groomed trail at Waterville Valley Resort, New Hampshire.

A backpacker takes in the view from Higby Mountain along the New England National Scenic Trail in Connecticut.

A skier and two snowboarders carve turns on a freshly groomed trail at Waterville Valley Resort, New Hampshire.

A backpacker pauses at a scenic vista on South Baldface Mountain in the White Mountain National Forest.

A backcountry skier takes a break along the Lodge-to-Lodge ski trail in the Maine Woods.

A freestyle snowboarder jibs a feature at Waterville Valley Resort, New Hampshire.

An ice climber belays off a frozen waterfall in Crawford Notch, New Hampshire.

Waterville Valley Resort's pond skimming competition is known for its thrills and dramatic, gear-soaking spills.

A cross-country skier breaks trail in Maine's 100-Mile Wilderness.

A hiker is dwarfed by stunning rock formations in Bryce Canyon National Park, Utah.

A freestyle skier catches some air in a halfpipe competition at Waterville Valley Resort, New Hampshire.

A hiker climbs the Ice Gulch boulder field in the Randolph Community Forest, New Hampshire.

A backpacker is silhouetted by the setting sun on Higby Mountain in Connecticut.

A skier and a snowboarder carve turns on a freshly groomed trail at Waterville Valley Resort, New Hampshire.

A man flips into the ocean in Cavendish, Prince Edward Island, Canada.

A hiker encounters sheep grazing in a mountain pass along the Tour du Mont Blanc in France.

A Tour du Mont Blanc hiker enters the town of Les Contamines-Montjoie, France.

A Tour du Mont Blanc backpacker makes her way to Chalet Refuge La Balme in the French Alps.

Tour du Mont Blanc hikers gather in the Col du Bonhomme, France.

A Tour du Mont Blanc hiker traverses a snowy grade in France's Col du Bonhomme.

A backpacker on the Tour du Mont Blanc descends winding switchbacks to the small village of Les Chapieux.

A Tour du Mont Blanc hiker's campground in the small village of les Chapieux.

A cross-country skier explores the Appalachian Mountain Club's Maine Woods ski network.

A cross-country skier explores the Appalachian Mountain Club's Maine Woods ski network.

A cross-country skier explores the Appalachian Mountain Club's Little Lyford Lodge and Cabins ski network.

A hiker takes in a view of South Baldface Mountain from an outcropping on the Baldface Circle Trail in Evans Notch, New Hampshire.

A hiker ascends North Baldface Mountain in Evans Notch, New Hampshire.

A hiker ascends North Baldface Mountain in Evans Notch, New Hampshire.

A hiker descends South Baldface Mountain in Evans Notch, New Hampshire.

A hiker descends South Baldface Mountain in Evans Notch, New Hampshire.

An On Belay Inc. participant begins her climb up a high-ropes obstacle.

A team of On Belay participants work together to complete a challenge course obstacle.

An On Belay Inc. participant begins his climb up a high-ropes obstacle.

An On Belay participant is lowered from a high-ropes obstacle at the Browne Center in Durham, N.H.

An On Belay Inc. participant is tied into her harness before beginning to climb.

A belayer lowers an ice climber on Frankenstein Cliff in Crawford Notch, New Hampshire.

An ice climber tops out on Frankenstein Cliff in Crawford Notch, New Hampshire.

An ice climber takes a break while climbing Frankenstein Cliff in Crawford Notch, New Hampshire.

A belayer lowers an ice climber on Frankenstein Cliff in Crawford Notch, New Hampshire.

An ice climber belays off a frozen waterfall in Crawford Notch, New Hampshire.

An ice climber scales a frozen waterfall on Frankenstein Cliff in Crawford Notch, New Hampshire.

An ice climber tops out in the dark on Frankenstein Cliff in Crawford Notch, New Hampshire.

An ice climber finishes an arduous climb in the dark on Frankenstein Cliff in Crawford Notch, New Hampshire.

An Appalachian Trail hiker pauses on McAfee Knob in Virginia to take in the view.

An Appalachian Trail hiker takes in the view from McAfee Knob, one of the most photographed destinations on the trail.

A hiker uses a ladder to climb over a fence at the Rocky Knob Recreation Area in Virginia.