Colin Monteath / Mountaineer enjoying the view of Mt Everest and the Himalayan Mountains at sunset from Gokyo Ri, Khumbu, Nepal

Tim Fitzharris / Teton Range at sunrise, Schwabacher Landing, Grand Teton National Park, Wyoming

Guy Edwardes / 'Alpenglow' at dawn, on Mt. Triglav, Julian Alps, Slovenia, February 2018.

Ashley Cooper / Alpenglow at sunrise on Annapurna South, Nepelese Himalayas.

Ashley Cooper / Alpenglow at sunset on Machapuchare, Annapurna Sanctuary, Nepelese Himalayas. Nepal, January 2013.

Ashley Cooper / Alpenglow at sunrise on Annapurna South and Annapurna Fang, Nepal. December 2012.

Ashley Cooper / Alpenglow at sunset on Machapuchare, Annapurna Sanctuary, Nepalese Himalayas. December 2012.

Ashley Cooper / Alpenglow at sunrise on Annapurna South, Nepelese Himalayas, Nepal, December 2012.

Ashley Cooper / Annapurna south with high winds blowing spindrift off the summit, Annapurna Sanctuary, Nepalese Himalayas, December 2012.

Ashley Cooper / Misty light over the Modi Khola valley below the Annapurna Sanctuary, Himalayas, Nepal. December 2012.

Sebastian Kennerknecht / Mountain range at dusk, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan

Sebastian Kennerknecht / Mountain range at dusk, Sarychat-Ertash Strict Nature Reserve, Tien Shan Mountains, eastern Kyrgyzstan

Colin Monteath/ Hedgehog House / Alpenglow lighting up high peaks of Wiencke and Anvers Islands, near Port Lockroy, Antarctic Peninsula, Antarctica

Colin Monteath/ Hedgehog House / Alpenglow over mountain range, Hawkdun Range, Central Otago, South Island, New Zealand

Colin Monteath / Alpenglow amd fog over lake, Lake Hayes, Arrowtown, Otago, New Zealand

Colin Monteath / Mount Rolleston at dawn, Arthur's Pass National Park, Canterbury, New Zealand

Colin Monteath / Waimakariri River basin in pre-dawn alpenglow from Mount Binser summit, Arthur's Pass National Park, New Zealand

Colin Monteath / Hut with alpenglow over Malte Brun and Liebig Range, Mount Cook National Park, New Zealand

Bryan and Cherry Alexander / Iceberg in alpenglow after sunset with cloudy sky behind, Antarctica, 1998.

Colin Monteath / Mount Taranaki showing western flanks of dormant volcano above clouds, New Zealand

Colin Monteath / Sunrise on Mount Sefton above Hooker Valley, Mount Cook National Park, New Zealand

Colin Monteath / Mount Cook at sunset, from Mount Wakefield, Mount Cook National Park, New Zealand

Colin Monteath / Mount Sefton at dawn with Hooker River flowing from Mueller Glacier, Mount Cook National Park, New Zealand

Colin Monteath / Mount Sefton at dawn with Hooker River flowing from Mueller Glacier, Mount Cook National Park, New Zealand

Colin Monteath / Sunrise on Mount Sefton and Mount Cook above Hooker Valley, Mount Cook National Park, New Zealand

Colin Monteath / Mount Tutoko at dawn, 2723 meters, is the highest peak in Darran Mountains, Hollyford Valley, Fiordland National Park, New Zealand

Colin Monteath / Mount Rolleston with dawn light, it is the dominant peak of Arthur's Pass National Park, Canterbury, New Zealand

Yva Momatiuk & John Eastcott / Colorful hoodoos, sandstone spires in alpenglow, Bryce Canyon National Park, Utah

Colin Monteath / Panorama from Everest to Taweche with alpenglow, Khumbu, Nepal

Colin Monteath / Panorama from Everest to Taweche with alpenglow, Khumbu, Nepal

Colin Monteath / Dawn on Kangchenjunga, Talung face from Dzong Ri, 8585 meters, most easterly of the world's fourteen 8000 metre peaks, Sikkim Himalaya, India

Colin Monteath / Sunset over Mueller Glacier Lake and Hooker Valley in winter seen from Sebastopol, Mt Cook National Park, New Zealand

Tim Fitzharris / Panorama of Mt Rundle reflected in Vermilion Lake, Banff National Park, Alberta, Canada

Tim Fitzharris / Sunset lighting up mountains under a full moon in Valley of Fire State Park, Mojave Desert, Nevada

Tim Fitzharris / Dream Lake, Rocky Mountain National Park, Colorado

Tim Fitzharris / Geissler Mountain reflected in Linkins Lake, Colorado

Tim Fitzharris / Teton Range reflected in water, Grand Teton National Park, Wyoming

Colin Monteath / Cerro Torre (Left) and Fitzroy at dawn from Loma Plieque Tumbado, Los Glaciares National Park, Patagonia, Argentina

Tim Fitzharris / Alpenglow, Lake Louise and Victoria Glacier, Banff National Park, Alberta, Canada

Rob Brown / Evening light on Mt Taranaki, also known as Mt Egmont (8,261 feet) a dormant volcano in the southwest corner of the North Island near the Tasman Sea, Egmont National Park, New Zealand

Colin Monteath / Cuernos del Paine at dawn and Lago Pehoe, Torres del Paine National Park, Patagonia, Chile

Colin Monteath / Cuernos del Paine at dawn and Lago Pehoe, Torres del Paine National Park, Patagonia, Chile

Rob Brown / Mt Ngauruhoe in foreground and Mt Ruapehu behind, Tongariro National Park, New Zealand

Colin Monteath / Mt Cook or Aoraki bathed in pre-dawn light, eastern side seen from the Malte-Brun Range in winter, Mt Cook National Park, New Zealand

Benjamin Olson / Alpenglow on mountains in winter, Yellowstone National Park, Wyoming

Tim Fitzharris / Alpenglow on Lone Pine Peak, Alabama Hills, California

Cyril Ruoso / Yakushima Mountains with alpenglow, Japan

Colin Monteath / Mount La Perouse, Mount Cook, Tasman Glacier, and Malte Brun Range seen from summit of Mount Kinsey, Mount Cook National Park, Canterbury, New Zealand

Colin Monteath / Mount Sefton at dawn seen from Mount Kinsey, Hooker Valley, Mount Cook National Park, Canterbury, New Zealand

Colin Monteath / Caroline Face of Mount Cook at dawn from Ball Pass, Mount Cook National Park, Canterbury, New Zealand

Colin Monteath / Alpenglow after sunset above Clyde River, Cloudy Peak Range, Canterbury, New Zealand

Colin Monteath / Domestic Sheep (Ovis aries) flock and pond in pre-dawn alpenglow, Rakaia Valley, Reishek Mountains, Canterbury, New Zealand

Sumio Harada / Mount Wilbur with alpenglow, Glacier National Park, Montana

Rob Brown / Sunset on Mount Aspiring, Mount Aspiring National Park, New Zealand

Colin Monteath / Alpenglow after sunset with clouds over Lake Wanaka, Otago, New Zealand

Colin Monteath / Storm at dawn covering Cerro Torre, Los Glaciares National Park, Patagonia, Argentina

Ingo Arndt / The Matterhorn with reflection in Riffelsee Lake, Alps, Switzerland

Colin Monteath / Dawn on Kangchenjunga, Talung face, 8595 meters, most easterly of the world's fourteen 8000 metre peaks, Sikkim Himalaya, India

Colin Monteath / Evening light on peaks behind Paradise Bay, Antarctic Peninsula, Antarctica

Matthias Breiter / Alpenglow on Mt Brooks, Denali National Park and Preserve, Alaska

Colin Monteath / Brash ice in Paradise Bay, sunset on peaks near Gerlache Strait, Antarctic Peninsula, Antarctica

Colin Monteath/ Hedgehog House / Alpenglow lighting up high peaks of Wiencke and Anvers Islands, near Port Lockroy, Antarctic Peninsula, Antarctica

Jeff Foott / Mountains reflected in pond, Grand Tetons, Grand Teton National Park, Wyoming

Heike Odermatt / Mountains with first snowfall in autumn, Grimsel Pass, Bernese Oberland, Switzerland

Jeff Foott / Full moon and sunrise over mountains, Grand Tetons, Grand Teton National Park, Wyoming

Jeff Foott / Full moon and sunrise over mountains, Grand Tetons, Grand Teton National Park, Wyoming

Oriol Alamany / Alpenglow at sunset in the Spitzkoppe mountains, Damaraland, Namibia