U.S. Corps of Engineers

Pioneer Nature Trail

Kansas

Backcountry Trail

USDA Forest Service

Pioneer Trail

California

Private

Pittsburgh-to-Harrisburg Main Line Canal Greenway

Pennsylvania

Backcountry Trail, Frontcountry Trail

State

Platte River Greenway Trail

Colorado

Frontcountry Trail

City, Town, or County

Pleasant Run Trail

Indiana

State

Pomeroy and Newark Rail Trail

Delaware

Backcountry Trail, Rail Trail, Urban Trail

U.S. Corps of Engineers

Pomme de Terre Multipurpose Trail

Missouri

Backcountry Trail

USDA Forest Service

Pony Express Trail

California

Backcountry Trail

USDA Forest Service

Pope-Baldwin Bicycle Trail

California

Urban Trail

State

Port Royal Sound Adventure Trail

South Carolina

Water Trail (other)

State

Post Oak Nature Trail

Kansas

Backcountry Trail

USDA Forest Service

Potawatomi-Gorge Falls Trail

Michigan

Backcountry Trail

State

Potomac River Water Trail

District of Columbia, Maryland, Virginia, West Virginia

Frontcountry Trail, Water Trail (other)

Nonprofit

Poudre River Trail Corridor

Colorado

Backcountry Trail, Urban Trail

City, Town, or County

Prairie Creek Greenway

Missouri

Frontcountry Trail, Urban Trail

U.S. Corps of Engineers

Prairie Creek Jogging Trail

Arkansas

Urban Trail

State

Prairie Spirit Rail Trail State Park

Kansas

Rail Trail

U.S. Fish and Wildlife Service

Prairie Winds Trail

South Dakota

Backcountry Trail

U.S. Fish and Wildlife Service

Prairie-Marsh Boardwalk

Montana

Backcountry Trail

City, Town, or County

Prescott Peavine Trail

Arizona

Backcountry Trail, Rail Trail