National Park Service

Bootjack Trail

California

Backcountry Trail

U.S. Corps of Engineers

Bossard Nature Trail

Pennsylvania

Backcountry Trail

USDA Forest Service

Boulder Cave Trail

Washington

Backcountry Trail

USDA Forest Service

Boulder Loop Trail

New Hampshire

Backcountry Trail

USDA Forest Service

Boulder River Natural Bridge and Falls Trail

Montana

USDA Forest Service

Boundary Trail

Washington

Backcountry Trail

USDA Forest Service

Boundary Trail

Oregon

Backcountry Trail

USDA Forest Service

Boundary Trail - Kangaroo Segment

California

Backcountry Trail

U.S. Corps of Engineers

Bridge Rock Trail

Arkansas

USDA Forest Service

Bridger Foothills

Montana

Backcountry Trail

National Park Service

Bright Angel Trail

Arizona

Backcountry Trail

Nonprofit

Bronx River Blueway

New York

National Water Trail

City, Town, or County

Brownsville Historic Battlefield Trail

Texas

Urban Trail

City, Town, or County

Brushy Creek Regional Trail & Conservation Corridor

Texas

Urban Trail

USDA Forest Service

Buck Canyon Trail

Oregon

Backcountry Trail

U.S. Corps of Engineers

Buckeye Trail

Arkansas

Backcountry Trail

USDA Forest Service

Bucking Mule Falls Trail

Wyoming

Backcountry Trail

U.S. Corps of Engineers

Buckskin Nature Trail

Arkansas

Backcountry Trail

State

Buffalo Track Canyon Trail

Kansas

Backcountry Trail

State

Bull Run - Occoquan Trail

Virginia

Frontcountry Trail