Trees in forest, Glacier National Park, Montana, USA

Park rangers cutting tree in forest, Weminuche Wilderness, Colorado, USA

Trees in forest, Mount Zirkel Wilderness, Routt National Forest, Colorado, USA

Trees in forest, Mount Zirkel Wilderness, Routt National Forest, Colorado, USA

Reeds in field, Yellowstone National Park, Wyoming, USA

Trees in front of house in field, Grand Teton, Grand Teton National Park, Wyoming, USA

River flowing through landscape, Yellowstone National Park, Wyoming, USA

Reflection of clouds and trees in water, Bear Lake, Rocky Mountain National Park, Holy Cross Wilderness, Colorado, USA

Lake with mountain in background, Grand Teton National Park, Wyoming, USA

River flowing through forest, Mount Zirkel Wilderness, Routt National Forest, Colorado, USA

Landscape with mountain range in background, Wind River Range, Fish Creek Park, Wyoming, USA

Log cabin in field with snowcapped mountains in background, Grand Teton, Grand Teton National Park, Wyoming, USA

Petrified Forest National Park, Arizona, USA

Sequoia trees (Sequoiadendron giganteum) in forest, Yosemite National Park, California, USA

Elk (Cervus elaphus nelsoni) belling in forest, Yellowstone National Park, Wyoming, USA

Lake in a forest, Yosemite National Park, California, USA

Fossils on landscape, Petrified Forest National Park, Arizona, USA

Petrified tree, Petrified Forest National Park, Arizona, USA, high angle view

Quaking Aspen (Populus tremuloides) trees in field, Denali National Park, Alaska, USA

Trees on a landscape under cloudy sky, Rocky Mountain National Park, Colorado, USA

Herd of American Bison (Bison bison) grazing in field, Yellowstone National Park, Wyoming, USA

Yosemite Falls, Yosemite National Park, California, USA

Watermill in autumn, Babcock State Park, West Virginia, USA

Lower Falls in the Grand Canyon of the Yellowstone view from Artist Point, USA

Trees in forest, Huston Park Wilderness, Wyoming, USA