Rocky Mountain National Park in Fall
Photo: Rocky Mountain National Park in Fall / iStock/Kristen Prahl

Trail Ridge Road in Rocky Mountain National Park

A nationally designated All-American Road, Trail Ridge Road winds 48 miles through Rocky Mountain National Park and peaks at 11 miles above the tree line, presenting spectacular views of its alpine meadows. Don’t be surprised if you feel like you’re at the Arctic Circle, especially later in the season – Trail Ridge Road is the highest continuously paved road in the United States. Rocky Mountain National Park has another road worth mentioning: Old Fall River. The one-way, unpaved switchback with no guardrails makes for a great adventure.

Read more: Boo! These 7 National Parks Are Haunted