A climber tackles a difficult boulder problem on the glacial moraine at Tangnag, near Mera Peak and Mount Everest, Khumbu Region, Nepal, Himalayas, Asia

A climber bouldering on the large granite boulders near Camp 4, the National Park Service campground underneath El Capitan, Yosemite Valley, California, United States of America, North America

A climber on a boulder above Chapel Stile in the Langdale Valley in the Lake District, Cumbria, England, United Kingdom, Europe

A man running up a boulder above Chapel Stile in the Langdale Valley in the Lake District, Cumbria, England, United Kingdom, Europe

A man running up a boulder above Chapel Stile in the Langdale Valley in the Lake District, Cumbria, England, United Kingdom, Europe

A climber and border collie dog on a boulder above Chapel Stile in the Langdale Valley in the Lake District, Cumbria, England, United Kingdom, Europe

A climber on a boulder above Chapel Stile in the Langdale Valley in the Lake District, Cumbria, England, United Kingdom, Europe

Caucasian man climbing rock

Caucasian rock climber chalking hands

Caucasian woman resting on rock near rope

Caucasian man fastening rope to harness of woman

Caucasian rock climber tying shoe

Caucasian couple high-fiving

Caucasian rock climber wearing sock

Caucasian man climbing rock

Carabiners on Caucasian man climbing rock

Caucasian woman climbing rock

Caucasian woman climbing rock

Caucasian man winding rope

Caucasian rock climber fastening rope to harness

Carabiners on Caucasian hiker

Caucasian woman fastening rope to harness

Woman hiking on boulders

Women climbing on boulders

Woman climbing on boulders

Barechested man climbing wall

Evening atmosphere, Young woman bouldering, Climbing, Peak of Ryten, Sea, Kvalvika beach and mountains, Fredvang, Lofoten, Nordland, Norway, Europe

Evening atmosphere, Young woman bouldering, Climbing, Peak of Ryten, Sea, Kvalvika beach and mountains, Fredvang, Lofoten, Nordland, Norway, Europe

Bruce Miller rock climbing on the route "The Wisdom", rated 5.11b, while his partner Steve Dieckhoff belays, on the Redgarde

A man reaching for a hold while lead climbing near Boulder, Colorado (High Angle Perspective).

Female climber bouldering on an overhang near San Antonio, Texas.

Rock climber Kelly Doyle climbing an overhanging bouldering route in the Buttermilks, outside of Bishop, California in the Sierra Nevada mountains near Hwy 395.

Woman bouldering near Austin, Texas.

A climber boulders on a sunny afternoon in Tralenta, France.

Climber using a finger hold while bouldering near Austin, Texas.

Working high above the busy road below, the two workers first secure the loose boulder to the cliff with a long metal pole.

Bruce Miller climbs on the hardest part, or "crux", of a route called "Jules Verne", rated 5.11a, high off the ground on the Redgarden Wall in Eldorado Canyon State Park, CO. Jules Verne is one of the more famous traditional or "trad" routes in the area, and has long sections between protection. Eldorado Canyon, located on the Front Range south of Boulder, and its steep, difficult sandstone cliffs attract climbers from around the country and the world, making it one of the most popular climbing areas in Colorado.

Beth Rodden holds onto the prow of a boulder with aspen shadows visible on its face outside Estes Park, Colorado. Beth Rodden is one of the worlds leading climbers.

Female Athlete Climbing On Boulder Outside By The River In Maryland

A strong female rope climber makes beginning moves on a difficult line in Colorado

Woman bouldering on an overhang

Bruce Miller climbs on the hardest part, or "crux", of a route called "Jules Verne", rated 5.11a, high off the ground on the Redgarden Wall in Eldorado Canyon State Park, CO. Jules Verne is one of the more famous traditional or "trad" routes in the area, and has long sections between protection. Eldorado Canyon, located on the Front Range south of Boulder, and its steep, difficult sandstone cliffs attract climbers from around the country and the world, making it one of the most popular climbing areas in Colorado.

The workers, working high above the busy road below, first secure the loose boulder to the cliff with a long metal pole.

Female Climber Climbing On Rock In Yosemite With El Capitan And Half Dome In Background

Man bouldering on an overhang

A Strong Male Boulders Without Ropes On An Overhanging Roof In Chimanimani National Park

Woman bouldering on an overhang

Rock climber on steep overhanging boulder during the Hueco Rock Rodeo in Hueco Tanks State Park, Texas

Male climber's hand on rock.

After the helicopter has put the net into place the workers fasten the loose boulder to the cliff.

Strong Female bouldering on overhanging rock in Idaho

A high angle view of Kevin Swift climbing on an overhanging boulder in the Buttermilks, California, near Bishop in the Eastern Sierra Nevada mountains..

A female climber's hand on rock.

Male brushes rock climbing hold before trying his rock climb in Boulder, Colorado

Male rock climber tries difficult boulder problem in Red Rock National Park, outside Las Vegas, Nevada

Topless caucasian male chalking up mid-climb on a boulder in Hampi, India.

Strong female looking towards next move on a boulder problem

Unidentifiable climber silhoutted bouldering in Logan Canyon. Utah, USA.

A female rock climber reaches out while on a boulder climb in Pemberton, British Columbia, Canada, Pemberton, British Columbia, Canada

Strong female climber looks for next move to make

A woman hangs on the side of boulder in the Valley of the Gods, Utah, United States of America

Overhead view of a woman climbing over the slippery, wet rocks along the rushing stream at Trafalgar Falls on the Caribbean Island of Dominica in Morne Trois Pitons National Park, Dominica, Caribbean

Carabiner on hook in steep rock face

Hikers in front of waterfall

Hikers in front of waterfall

Hikers in front of waterfall