National Park Service

6 to 10 Trail

Pennsylvania

Backcountry Trail, Frontcountry Trail, Rail Trail

City, Town, or County

Acadiana Park Trails

Louisiana

Frontcountry Trail

USDA Forest Service

Acker Divide Trail

Oregon

Backcountry Trail

State

Adventure Hiking Trail

Indiana

Backcountry Trail

USDA Forest Service

Agonikak National Recreation Trail

Michigan

Urban Trail

City, Town, or County

Ahnapee State Park Trail

Wisconsin

Rail Trail

State

Air Line State Park Trail - South

Connecticut

Frontcountry Trail, Rail Trail

Nonprofit

Alabama Scenic River Trail

Alabama

National Water Trail

State

Alabama State Lands Bartram Canoe Trail

Alabama

Water Trail (other)

U.S. Fish and Wildlife Service

Alamosa South Bluff Trail

Colorado

Frontcountry Trail

Commission

Albany Pine Bush Preserve/Kings Highway

New York

Frontcountry Trail

City, Town, or County

Algonkian Regional Park Sanctuary Trail

Virginia

Backcountry Trail

City, Town, or County

Aliso Creek Regional Bikeway, Riding and Hiking Trail

California

Backcountry Trail, Urban Trail

Nonprofit

Allegheny River Trail

Pennsylvania

Backcountry Trail, Rail Trail

USDA Forest Service

Alum Cove Natural Bridge Trail

Arkansas

Backcountry Trail

Bureau of Land Management

Amboy Crater Trail

California

Backcountry Trail

City, Town, or County

American Tobacco Trail

North Carolina

Frontcountry Trail

USDA Forest Service

Anderson Butte Trail

Idaho

Backcountry Trail

U.S. Corps of Engineers

Anderson Road Fitness Trail

Tennessee

Urban Trail

U.S. Corps of Engineers

Anderson Woodland Trail

Kentucky

Backcountry Trail