Colorado's Rocky Mountain National Park, which spans 415 square miles, offers endless recreation opportunities. From watching the trees change colors in the fall to cross-country skiing in the ...

This story appears in the February 2019 issue of National Geographic magazine. In Rocky Mountain National Park, 415 square miles of mountain terrain are protected—but not from effects of climate ...

Where else can you start your hike in the summer sun and end it atop a mountain in the snow? One place is Rocky Mountain ...

Jan. 26, Rocky Mountain National Park celebrated its 110-year anniversary as a national park. On Jan. 26, 1915, President ...

Back before the internet, hikers only had one tool to explore Rocky Mountain National Park. They simply called it the Dannen book. Kent Dannen, seen in this undated photo, wrote the guidebook ...

Average annual temperature increase over the last century in the high-elevation park from climate change Rocky Mountain National Park covers 415 square miles atop the Continental Divide in the Front ...