A lone bison (bison bison) grazes on the buttes of Grasslands National Park; Saskatchewan, Canada PacificStock
A man walks out the entrance of an ice tunnel at the terminus of Canwell Glacier in the Alaska Range in mid-winter; Alaska, United States of America PacificStock
Aurora borealis over the Alaska Range, near Black Rapids; Alaska, United States of America PacificStock
The aurora fills the sky above the historic Black Rapids Roadhouse along the Richardson Highway on a bitterly cold night; Alaska, United States of America PacificStock
The aurora glows in the sky above Donnelly Dome and a snowy, moonlit landscape, south of Delta Junction; Alaska, United States of America PacificStock
Rays of sunlight through trees illuminate ice fog on a very cold day; Fairbanks, Alaska, United States of America PacificStock
A bright band of aurora borealis stretches across the sky over a frozen beaver pond; Alaska, United States of America PacificStock
Morning alpenglow on an unnamed peak near McGinnis Glacier in the Alaska Range; Alaska, United States of America PacificStock
Autumn sunset overlooking the area known as 'Black Rapids' in the Alaska Range along the Richardson Highway; Alaska, United States of America PacificStock
Low altitude fog is cast in warm sunset light along Turnagain Arm and the Seward Highway in winter, sea ice covering the ocean in the foreground, the Chugach Moutains revealed in the background, South-central Alaska; Alaska, United States of America PacificStock
A backcountry skier looks over the Black Rapids Glacier valley from a high point on the terminal moraine in winter; Alaska, United States of America PacificStock
The sun shines through low altitude fog cast in warm light along Turnagain Arm and the Seward Highway, sea ice covering the ocean in the foreground, the Kenai Moutains revealed in the background, South-central Alaska; Alaska, United States of America PacificStock
Colourful Aurora borealis over a man with arms outstretched silhouetted against light pollution from nearby Fort Greely; Alaska, United States of America PacificStock
Artistic montage of snow contouring a creek bed with graphic designs of curving highlights and shadows; Lake Louise, Alberta, Canada PacificStock
Aurora borealis swirls over mountains within Denali National Park on a very cold winter night; Alaska, United States of America PacificStock
Artistic montage of snow contouring a creek bed with graphic designs of curving highlights and shadows; Lake Louise, Alberta, Canada PacificStock
Aurora borealis stretches over mountains within Denali National Park on a very cold winter night; Alaska, United States of America PacificStock
Sunrise over the pond and mountains along the Parks Highway in autumn, near Cantwell in interior Alaska; Alaska, United States of America PacificStock
Artistic montage of snow contouring a creek bed with graphic designs of curving highlights and shadows; Lake Louise, Alberta, Canada PacificStock
A hiker on a ridge in Denali National Park is dwarfed by Denali at sunrise in winter; Alaska, United States of America PacificStock