Donald M. Jones / Moose (Alces alces) bull in fall at tundra pond, Mount Denali, Denali National Park, Alaska

Jack Dykinga / Mount McKinley and Black Spruce trees (Picea mariana) viewed from Wonder Lake, Denali National Park, Alaska

Yva Momatiuk & John Eastcott / Mt Denali and Alaska Range reflected in pond in the morning light, Denali National Park and Preserve, Alaska

Yva Momatiuk & John Eastcott / Glacial kettle pond with Alaska Range and Mount McKinley in distance, Denali National Park and Preserve, Alaska

Colin Monteath / Climber hauls load above 4,200 meter camp on the west buttress route of Mt Denali or Mt McKinley which reaches 6,194 meters elevation, Denali National Park and Preserve, Alaska

Matthias Breiter / Two climbers at Ruth Glacier, with Mt McKinley towering above them, Denali National Park and Preserve, Alaska

Michio Hoshino / Caribou (Rangifer tarandus) pair grazing on autumn tundra near Mt Denali, Denali National Park and Preserve, Alaska

Shin Yoshino / Alaska Moose (Alces alces gigas) male near Mt Denali, Denali National Park and Preserve, Alaska

Michio Hoshino / Snow-covered peaks of the Alaska Range with Mt Denali in the background, Alaska

Chase Dekker / Bus driving down road towards Mount Denali, Denali National Park, Alaska

Ingo Arndt / Mount McKinley and Mount Denali with lenticular clouds, Denali National Park, Alaska, July 2012.

Matthias Breiter / Mount Denali in the morning light, Denali National Park and Preserve, Alaska