Konstantin Mikhailov / Lake Ann surrounded by Douglas firs (Pseudotsuga menziesii) Silver firs (Abies alba) and other conifers in the area of Rainy Pass of North Cascades National Park, North Cascades National Park, Cascade...

Colin Monteath / Campers read in tents lit by flashlight, Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Dart Glacier above Cascade Saddle, Mount Aspiring National Park, New Zealand

Kevin Schafer / Oregon Bitter-root (Lewisia rediviva) flowers, Cascade Mountains, Washington

Tim Fitzharris / Eagle Peak from Mirror Lake, Cascade Range, Lassen Volcanic National Park, California

Kirkendall-Spring / Hiker exploring Titcomb Basin, Wind River Range, Bridger Wilderness, Bridger National Forest, Wyoming, USA. September 2015. Model released.

Kirkendall-Spring / Prusik Peak and a small tarn near Prusik Pass in the Enchantment Lakes area, Alpine Lakes Wilderness, Okanogan Wenatchee National Forest, Washington, USA. October 2015.

Kirkendall-Spring / Western larch needles (Larix occidentalis) needles floating on surface of tarn, Enchantment Lakes area, Alpine Lakes Wilderness, Okanogan Wenatchee National Forest, Washington, USA.

Kirkendall-Spring / Western larch needles (Larix occidentalis) floating on surface of tarn, Enchantment Lakes area, Alpine Lakes Wilderness, Okanogan Wenatchee National Forest, Washington, USA.

Luis Quinta / Mizarela Waterfall, Freita Mountain Range, Portugal, March 2015.

Luis Quinta / Mizarela Waterfall, Freita Mountain Range, Portugal, March 2015.

Colin Monteath / Mount Aspiring reflected in high mountain lake, Cascade Saddle, Mount Aspiring National Park, Otago, New Zealand

Colin Monteath / Hikers making hot drinks, Cascade Saddle, Mount Aspiring National Park, Otago, New Zealand

Floris van Breugel / Subalpine larches (Larix lyallii) in snow, below Prusik Peak in Enchantment Lakes region, Alpine Lakes Wilderness, central Cascade range, Washington, USA

Floris van Breugel / Tents at the mountaineering base camp for Mount Baker at sunrise, in the snow, Cascade Range, Washington, USA, June 2013

Matthias Breiter / Chorrillo del Salto waterfall below Mount Fitz Roy, Patagonia, Argentina

Matthias Breiter / Chorrillo del Salto waterfall below Mount Fitz Roy, Patagonia, Argentina

Cyril Ruoso / Stub-foot Toad (Atelopus laetissimus) near waterfall, Sierra Nevada de Santa Marta, Colombia

Cyril Ruoso / Stub-foot Toad (Atelopus laetissimus) pair near waterfall, Sierra Nevada de Santa Marta, Colombia

Floris van Breugel / Enchantment Lakes in early winter snow with Larch trees bearing autumn leaves, Alpine Lakes Wilderness, Central Cascade range, Washington, USA, November 2011.

Tim Fitzharris / Cascade Mountains, Banff National Park, Alberta, Canada

Konstantin Mikhailov / View to Mt.Logan Ridge in low clouds from the Maple-Loop Trail in Rainy Pass area of North Cascades National Park, Cascade Range, Washington, USA, October 2009.

Konstantin Mikhailov / The spectacular Loop-Maple Trail heading up from Rainy Pass area of North Cascades Scenic Highway, above the tree line, with the islets of sub alpine fir and larch trees, North Cascades National Park...

Konstantin Mikhailov / The spectacular Loop-Maple Trail heading up from Rainy Pass area of North Cascades Scenic Highway, above the tree line, with the islets of sub alpine firs and larches, North Cascades National Park Cas...

Konstantin Mikhailov / The rocky highlands of North Cascades Range above the tree line in clouds on Maple-Loop Trail in Rainy Pass area, North Cascades National Park, Cascade Range, Washington, October 2009.

Konstantin Mikhailov / View to Mt.Logan Ridge in low clouds from the Maple-Loop Trail in Rainy Pass area of North Cascades National Park, Cascade Range, Washington, USA, October 2009.

Konstantin Mikhailov / View to Mt.Logan Ridge in low clouds from the Maple-Loop Trail in Rainy Pass area of North Cascades National Park, Cascade Range, Washington, USA, October 2009.

Konstantin Mikhailov / The Loop-Maple Trail heading up from Rainy Pass area of North Cascades Scenic Highway, above the tree line, with the islets of sub alpine firs and larches, North Cascades National Park Cascade Range,...

Konstantin Mikhailov / The rocky highlands of North Cascades Range above the tree line in clouds, on Maple-Loop Trail in Rainy Pass area, North Cascades National Park, Cascade Range, Washington, October 2009.

Konstantin Mikhailov / Scenic view from Mt. Rainier Sunrise point to the eastern ridges, Governors ridge, Crystal Mountain, Norse Peak of Cascade Range at sunrise, Mt. Rainier National Park, Washington, USA, North America,...

Colin Monteath / Mount Tyndall, reflection in tarn, Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Tyndall, reflection in tarn at Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Cascade Saddle at sunrise, Mount Aspiring on right above Matukituki Valley, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring and Matukituki Valley from route to Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Anvil shaped cloud at sunset above Matukituki Valley, from Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Dart Glacier above Cascade Saddle showing medial moraines, Mount Aspiring National Park, New Zealand

Colin Monteath / Dart Glacier above Cascade Saddle showing medial moraines, Mount Aspiring National Park, New Zealand

Colin Monteath / Cascade Saddle sunrise, Mount Aspiring on extreme right above Matukituki Valley, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring, moonrise over Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring, moonrise over Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring, moonrise over Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring, moonrise over Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Tyndall, reflection in tarn at Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Cascade Saddle, snowgrass alpine zone above Dart Glacier, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring and Matukituki Valley from route to Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring, moonrise at dusk over Cascade Saddle, Mount Aspiring National Park, New Zealand

Colin Monteath / Mount Aspiring, moonrise over Cascade Saddle, Mount Aspiring National Park, New Zealand

Tim Fitzharris / Oak Creek in Slide Rock State Park near Sedona, Arizona

Tim Fitzharris / Oak Creek in Slide Rock State Park near Sedona, Arizona

Steven Kazlowski / Clark's nutcracker (Nucifraga columbiana) perched on rock, Upper Enchantments Lake Basin, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, Summer

Steven Kazlowski / Upper Enchantment Lakes Basin at dawn with Prusik Peak (left) and The Temple in the distance, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, August 2008

Steven Kazlowski / Upper Enchantments Lake Basin, more than 7,000 feet above sea level, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, August 2008

Steven Kazlowski / Silhouetted view of the Alpine Lakes Wilderness Area from Asgaard Pass, in the Upper Enchantments Lake Basin, more than 7,000 feet above sea level, Okanogan-Wenatchee National Forest, Cascade Range, W...

Steven Kazlowski / Upper Enchantment Lakes Basin at dawn with Prusik Peak (left) and The Temple in the distance, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, August 2008

Steven Kazlowski / Hoary marmot (Marmota caligata) in an alpine boulder field, Copper Ridge, North Cascades National Park, Cascade Range, Washington, Summer

Steven Kazlowski / Alpine wildflowers, Oval-leaf buckwheat (Eriogonum ovalifolium var. nivale) along a trail in late summer, Upper Enchantments Lake Basin, more than 7,000 feet above sea level, Alpine Lakes Wilderness,...

Steven Kazlowski / Little Annapurna peak and the Upper Enchantments Lake Basin, more than 7,000 feet above sea level, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, Summer, Augus...

Steven Kazlowski / Cluster of alpine wildflowers, probably Golden fleabane {Erigeron aureus}, Upper Enchantments Lake Basin, more than 7,000 feet above sea level, Alpine Lakes Wilderness, Okanogan-Wenatchee National Fo...

Steven Kazlowski / Clark's nutcracker (Nucifraga columbiana) foraging, Upper Enchantments Lake Basin, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, Summer

Steven Kazlowski / Landscape view of the Upper Enchantments Lake Basin in summertime, more than 7,000 feet above sea level, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, August...

Steven Kazlowski / Little Annapurna peak and the Upper Enchantments Lake Basin, more than 7,000 feet above sea level, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, Summer, Augus...

Steven Kazlowski / Cluster of alpine wildflowers along a trail, Upper Enchantments Lake Basin, more than 7,000 feet, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, Summer

Steven Kazlowski / Grasshopper camouflaged amongst speckled granite and colorful lichens, looking for food, Upper Enchantments Lake Basin, more than 7,000 feet above sea level, Alpine Lakes Wilderness, Okanogan-Wenatche...

Konrad Wothe / Mount Hood (3,429 meters) with weathered trees, Oregon

Kevin Schafer / Sword Fern (Polystichum munitum) showing underside with spores, Cascade Mountains, Washington

Kevin Schafer / Mountain Lady's Slipper (Cypripedium montanum) flowers, Cascade Mountains, Washington

Kevin Schafer / Tweedy's Pussypaws (Lewisia tweedyi) close up showing stamens with pollen-covered anthers, Cascade Mountains, Washington

Kevin Schafer / Mountain Lady's Slipper (Cypripedium montanum) orchid, eastern Cascade Mountains, Washington

Yva Momatiuk & John Eastcott / Waterfalls of river flowing from glaciers and snow fields of Fitzroy Massif cascading over rocks, Andes, Los Glaciares National Park, Patagonia, Argentina

Yva Momatiuk & John Eastcott / Waterfalls of river flowing from glaciers and snow fields of Fitzroy Massif cascading over rocks, Andes, Los Glaciares National Park, Patagonia, Argentina

Tim Fitzharris / Cascade Range from Sunrise Point, Mount Rainier National Park, Washington

Tim Fitzharris / Mist rising in the Cascade Mountains near Hope, British Columbia, Canada

Tim Fitzharris / The Cascades from Yosemite National Park, California

Tim Fitzharris / Cascade Mountains reflected in Silver Lake near Hope, British Columbia, Canada

Tim Fitzharris / Mt Rainier, Cascade Mountains, Washington

Tim Fitzharris / Mt Shuksan, northern Cascade Mountains, Washington

Tim Fitzharris / Mt Baker, Cascade Mountains, Washington

Colin Monteath / Hiker and tent, Cascade Saddle, Mount Aspiring National Park, Otago, New Zealand

Colin Monteath / Anvil shaped cloud at sunset above Matukituki Valley, from Cascade Saddle, Mount Aspiring National Park, New Zealand

Yva Momatiuk & John Eastcott / Blue glacier melting fast due to global warming and releasing streams of melt water which cascade over steep rocky cliffs into sea below, Drygalski Fiord, Salversen Range, South Georgia Island, Southe...

Grant Maslowski / Cascade gecko (Mokopirirakau "Cascades") resting on rock with tongue out, Haast Range, West Coast, New Zealand.

Grant Maslowski / Cascade gecko (Mokopirirakau "Cascades") resting on lichen covered rocks, Haast Range, West Coast, New Zealand.

Grant Maslowski / Cascade gecko (Mokopirirakau "Cascades") skin pattern detail, Haast Range, West Coast, New Zealand. March, 2018.

Grant Maslowski / Cascade gecko (Mokopirirakau "Cascades") female, resting on rock on mountainside, Haast Range, West Coast, New Zealand.

Grant Maslowski / Cascade gecko (Mokopirirakau "Cascades") resting on Vegetable sheep (Raoulia sp.) on mountainside, Haast Range, West Coast, New Zealand.

Grant Maslowski / Cascade gecko (Mokopirirakau "Cascades") resting on Vegetable sheep (Raoulia sp.) on mountainside, Haast Range, West Coast, New Zealand.

Grant Maslowski / Cascade gecko (Mokopirirakau "Cascades") head portrait, Haast Range, West Coast, New Zealand.

Tim Laman / Palm tree and large buttresses tree line a boulder strewn rainforest river with small cascade. Iron Range National Park, Cape York Peninsula, Australia