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 ...

Average annual temperature increase over the last century in the high-elevation park from climate change Rocky Mountain National ... Divide in the Front Range mountains of Colorado. The park consists ...

While Trail Ridge Road allows visitors to coast over the Rocky Mountains, Old Fall River Road ... primarily gravel terrain and an absence of guardrails keep the speed limit at 15 mph.