State

Lower Cache River Trail

Illinois

Backcountry Trail, Water Trail (other)

City, Town, or County

Lower Macleay Trail

Oregon

Backcountry Trail, Urban Trail

Nonprofit

Lower Trail

Pennsylvania

Backcountry Trail, Frontcountry Trail, Rail Trail, Urban Trail

City, Town, or County

Lumber River Trail

North Carolina

USDA Forest Service

Lupine Lake Trail

Montana

Backcountry Trail

City, Town, or County

Luzerne County Rail-Trail

Pennsylvania

Rail Trail

USDA Forest Service

Maah Daah Hey

North Dakota

Backcountry Trail

USDA Forest Service

Mackenzie Touring

Michigan

Backcountry Trail

State

Mackinac Island Trail System

Michigan

Rail Trail

City, Town, or County

Mad Creek Greenbelt

Iowa

Frontcountry Trail

U.S. Fish and Wildlife Service

Magnolia Trail

Mississippi

Backcountry Trail

U.S. Fish and Wildlife Service

Mahnomen Trail

Minnesota

Rail Trail