Rocky Mountain National Park's Trail Ridge Road opened for the season on Friday. US 34 connects Grand Lake and Estes Park.

Perhaps it was hubris for Rocky Mountain National Park’s founders to name this alpine reserve as if it was the ne plus ultra of a 3,000-mile-long mountain range. Then again, ask anyone to picture the ...

Great Smoky Mountains National Park, far and away the busiest U.S. national park with 12.1 million visitors, placed first ...

Old Fall River Road on the east side of Rocky Mountain National Park is partially closed during the week as spring ...

Officials with Rocky Mountain National Park say their most popular "highway to the sky" is now open for the 2025 season. Trail ...

Toll was among the 24 founding members of the Colorado Mountain Club and served on the organization’s first board of directors. The club worked for the creation of Rocky Mountain National Park.

A rundown on all the permits and passes you’ll need to visit Colorado’s national parks—plus two of our favorites in Utah—this ...

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 ...

Chaco Culture National Historical Park was first ... Navajo Nation observes Mountain Daylight Savings, whereas the rest of the state of Arizona does not. Therefore, from March through November, the ...

Review our methodology for a full explanation of data sources and calculations utilized to assign grades for the air you breathe. The colors used in “State of the Air" are based on the Air Quality ...