The new Northern Colorado trail connects hundreds of routes around the Rocky Mountains National Park and other wilderness ...

While efforts to make it a national park have fallen short, this sublime Idaho mountain range is well worth a visit.

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 ...

Rocky Mountain National Park is home to herds of elk and bighorn sheep, but it also has a population of mountain lions and black bears. Although attacks are very rare, the National Park Service ...

The best time to visit Rocky Mountain National Park is from June to September when the snow is (mostly) melted and the hiking trails and attractions are accessible. Still, these four months are ...

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 ...

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 ...

As many of us who live in Grand County remember, Rocky Mountain National Park commemorated its 100th anniversary in 2015. As ...

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 ...