I've been to all 63 major US national parks. These are the 6 I always tell people to visit in the fall.

For those who have visited all 63 major US national parks, I've compiled a list of six parks that shine in the fall. Emily Hart, after exploring every major park, shares her top picks for autumn experiences.

Acadia National Park, located in Maine, is renowned for its stunning fall foliage. The park's rugged coastline, forested trails, and iconic Cadillac Mountain summit offer breathtaking views of vibrant maple and oak trees. Emma Hart recommends timing your visit to avoid the crowds, especially at popular spots like the summit and Jordan Pond.

Cuyahoga Valley National Park in Ohio is another hidden gem for autumn. The park's forests along the Cuyahoga River provide excellent opportunities for leaf peeping, with peaceful rolling hills even during peak visitation. Emma Hart suggests exploring popular trails like the Brandywine Gorge Loop and the Ohio and Erie Canal Towpath for classic autumnal scenery, while also discovering quieter spots to enjoy the foliage without crowds.

Colorado's Rocky Mountain National Park showcases its beauty in the fall, with aspen trees turning brilliant gold against high mountain peaks. Emma Hart recommends taking a leisurely walk around Bear Lake to soak in the vibrant colors, while keeping in mind that timed-entry reservations are required for certain areas through mid-October.

Great Smoky Mountains National Park, spanning North Carolina and Tennessee, is a top destination for fall colors. With over 100 native tree species, the park's foliage remains spectacular from late September to early November. Emma Hart highlights scenic drives on Kuwohi Road and the Alum Cave Trail for breathtaking views, all set against cooler temperatures that make exploring the park more enjoyable.

Arizona's Grand Canyon National Park offers a magical fall experience, with cooler temperatures making hiking and sightseeing more comfortable. Although some areas are temporarily closed due to flash floods, the South Rim remains fully accessible for visitors. Emma Hart points out that popular viewpoints like Mather Point and Desert View are less crowded in the fall compared to the summer months, and trails like South Kaibab allow for a tranquil exploration of the canyon's layered cliffs and dramatic sunsets.

Lastly, Grand Teton National Park in Wyoming offers a spectacular fall season, with aspens and cottonwoods turning gold against iconic mountain peaks. Emma Hart notes that September and October typically bring cooler weather and smaller crowds, making it an ideal time to witness wildlife such as elk or moose grazing in the meadows.