Mount Sanitas, East Ridge, and Sanitas Valley Loop

City of Boulder Open Space & Mountain Parks, Colorado

Pawnee Buttes Trail

Pawnee National Grassland, Colorado

Maquoketa Caves Loop

Maquoketa Caves State Park, Iowa

Mount Nebo Rim Trail

Mount Nebo State Park, Arkansas

Delicate Arch Trail

Arches National Park, Utah

West Kennecott Glacier Trail

Wrangell–St. Elias National Park, Alaska

Dune Ridge Trail

Indiana Dunes National Park, Indiana

Scuppernong Green and Observation Loop

Kettle Moraine State Forest, Wisconsin

Lawn Lake Trail

Rocky Mountain National Park, Colorado

Zebra Slot Canyon

Utah

Boynton Canyon Trail with Subway Cave

Coconino National Forest, Arizona

Pepper Peak via Twin Peaks Trail

Chugach State Park, Alaska

Savage Alpine Trail

Denali National Park, Alaska

Soda Canyon Overlook

Mesa Verde National Park, Colorado

High Dune Loop

Great Sand Dunes National Park