Rocky Mountain National Park is home to herds of ... Rising from 7,800 feet to 14,259 feet, RMNP is a high-elevation park, and if you don't give yourself time to adjust to the thinner atmosphere ...

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 ...

All these years later, the Rocky Mountains continue to be a hub for ... "Mid-Holocene treeline expanded ~180 m above its modern elevation when warm-season temperatures were similar to mid-to ...