Glacier National Park preserves more than a million acres of forests, alpine meadows, lakes, rugged peaks and glacial-carved valleys in the Northern Rocky Mountains. The landscape is a hiker's paradise that is traversed by more than 740 miles of maintained trails. See NPS.gov/glac for more info.
Photo courtesy of Brenda Ahearn, AP
Glacier National Park
Gorgeous at any time of year, Glacier might be at its absolute best during a summer sunrise.
Acadia National Park is a lush coastal landscape on the edge of the Atlantic Ocean. Dozens of lakes, acres of forest and over 40 miles of rocky coastline make this park a national treasure. Coincide your visit with low tide to explore the vibrant tidepool fauna: starfish, mussels, sea cucumbers and more.
Grand Teton National Park contains this epic skyscraping trio of mountains, which rise dramatically from the flat Great Plains in western Wyoming. Part of the larger chain of the Teton mountain range, this rugged wilderness is home to dozens of species of Western wildlife: from black bears and golden eagles on the slopes to bison in the low-lying plains. Read more and plan your trip at NPS.gov/grte.
Photo courtesy of Karen Bleier, AFP/Getty Images
Horses Before a Storm at Grand Teton
You can see dramatic stormy weather during summer and fall in Grand Tetons National Park.
Located in lush western Washington, Olympic National Park contains several distinct ecosystems. From old-growth forest to towering mountain peaks and vibrant Pacific shoreline, visitors can spend days here and not see it all. Learn more at NPS.gov/olym.
Untamed rivers flow from glacier-capped peaks through valleys of old-growth forests, waves crash against a shoreline rich with life, and only trails traverse the vast interior of this internationally recognized wilderness.
The massive towering rock formations at Zion National Park are otherworldly and stunning. Wind and water have sculpted the red, pink and cream sandstone cliffs into amazing arches and slot canyons. One of the American West's most stunning locations. See NPS.gov/zion for more.
Yellowstone National Park is one of the best icons of the American West. Its huge expanse covers nearly 3,500 square miles and is home to innumerable majestic animals: grizzly bears, bison, gray wolves, mountain lions and more.
Photo courtesy of Rich Abrahamson, The Fort Collins Coloradoan
Gorgeous Blue Spring
At Yellowstone, you'll see bubbling prismatic springs and crashing waterfalls, unlike any other place on earth.
Visitors to Rocky Mountain National Park enjoy hiking, camping, and of course nature watching. The rivers, forests and mountains are home to dozens of species: from the epic elk herds to the boisterous bighorn sheep, you'll never see it all.
Elk herds in Rocky Mountain
Visit in autumn to see the territorial elk bucks "bugle" and fight for annual dominance.
The #1 most-visited national park in 2015 was Great Smoky Mountains National Park. Tucked away in the rolling Appalachian mountains of Tennessee, this American treasure has epic scenic views, tumbling mountain waterfalls, and of course the iconic "smoky" peaks.