The pika, threatened by climate change--shown in Rocky Mountain National Park.

Elk, Rocky Mountain National Park, Colorado

Rocky Mountain National Park, Colorado

Dream Lake, Rocky Mountain National Park, Colorado

Rocky Mountain National Park, Colorado

Rainbow over Rocky Mountain National Park, Colorado

Bear Lake, Rocky Mountain National Park, Colorado.

Notchtop Mountain, Rocky Mountain National Park, Colorado

Lake of glass, Rocky Mountain National Park, Colorado

Black Lake - Rocky Mountain National Park, Colorado

Rocky Mountain National Park

The best national park there is. Rocky Mountain National Park

Bear Lake, Rocky Mountain National Park, Colorado.

Aspen sunset over Bear Lake - Rocky Mountain National Park, Colorado

Towards The Light — Rocky Mountains, CO

Elk in Moraine Park, Rocky Mountain National Park, Colorado

Bear Lake in Rocky Mountain National Park, Colorado • photo: Robin Wilson on Flickr

Mountain Lion in Rocky Mountain National Park

Sky Pond, Rocky Mountain National Park, Colorado; photo by Wayne Boland

Bobcat in Rocky Mountain National Park

View of the rocky shoreline of Dream Lake in Rocky Mountain National Park