Sand dunes are like giant sandboxes for big kids to play in and hike on, so we came up with a list of our favorites from across the National Park Service (NPS) System. Unlike most NPS backcountry trails, dogs are allowed on many of these dunes if they are leashed and picked up after.
10. Cape Lookout National Seashore (North Carolina)
9. Indiana Dunes National Park (Indiana)
8. Salt Basin Dunes at Guadalupe Mountains National Park (Texas)
7. Mesquite Flat Dunes at Death Valley National Park (California)
6. Sleeping Bear Dunes National Lakeshore (Michigan)
5. Eureka Dunes at Death Valley National Park (California)
4. Kelso Dunes at Mojave National Preserve (California)

3. White Sands National Park (New Mexico)
2. Panamint Dunes at Death Valley National Park (California)
…and finally our #1 sand dune in a National Park:

1. Great Sand Dunes National Park and Preserve (Colorado)
Honorable Mention
Padre Island National Seashore (Texas)