U.S. Fish and Wildlife Service

Arivaca Cienega Trail

Arizona

Backcountry Trail

U.S. Fish and Wildlife Service

Arivaca Creek Trail

Arizona

Backcountry Trail

State

Arkansas River Water Trail

Kansas

National Water Trail

USDA Forest Service

Arkaquah

Georgia

Backcountry Trail

City, Town, or County

Arrowhead Trail

Pennsylvania

Rail Trail

U.S. Fish and Wildlife Service

Arrowwood NWR Leg of the Historic Ft. Totten Trail

North Dakota

Backcountry Trail

USDA Forest Service

Art Loeb Trail

North Carolina

Backcountry Trail

City, Town, or County

Aspen Spring Trail

Arizona

Backcountry Trail

National Park Service

Atlantic White Cedar Swamp

Massachusetts

Backcountry Trail

State

Aucilla River Trail

Florida

Water Trail (other)

Nonprofit

Autauga Creek Canoe Trail

Alabama

Water Trail (other)

City, Town, or County

B-Line Trail

Indiana

Urban Trail