An analysis of data from 1999 through 2023 shows 93% of parks and wilderness areas saw improved air quality on clear days.

On Sunday, April 19, all of America's 63 National Parks will be free to enter in celebration of the first day of National ...

Once known as one of the smoggiest, most polluted cities in the US, Chattanooga in Tennessee has just been recognized as the ...

Gypsum dune fields at White Sands National Monument within the Chihuahuan Desert and the Tularosa Basin near Alamogordo, New ...

From the adorable but deadly pine marten to the massive sperm whale, get to know some of the amazing animals that call ...

During a hike in the Great Smoky Mountains National Park in 1995, Don Barger climbed Chilhowee Mountain hoping to gaze across the valley below. All he saw was a wall of gray haze.

It will take all of us to tell Trump to take a hike … in Utah, Arizona, Colorado or really anywhere in the U.S. where the ...

If your destination is Flagstaff, the Grand Canyon, or even Las Vegas, add a pit stop to see another National Park Service ...

In 1903, President Theodore Roosevelt commenced his 1903 visit of Wyoming, starting with 16 days in Yellowstone National Park. His total time in Wyoming for the ...

I think we can end up with, for example, fewer people working for the national park system ... of the folks who first really got federal lands going. I'm thinking here of the vision from Teddy ...

The Theodore Roosevelt Medora Foundation has tapped a North Dakotan and longtime executive as its next leader.