Controversial multi-use trail cuts through former nuclear weapons manufacturing facility with history of spills. Boulder ...

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 ...

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 ...

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 ...