USDA Forest Service

Middle Fork Trail

Oregon

Backcountry Trail

U.S. Fish and Wildlife Service

Migrants Mile Trail

Kansas

Backcountry Trail, Urban Trail

USDA Forest Service

Mill Creek-Main Fork Trail

Idaho

Backcountry Trail

Nonprofit

Milwaukee Urban Water Trail

Wisconsin

Water Trail (other)

City, Town, or County

Mineral Belt Trail

Colorado

Rail Trail

Bureau of Land Management

Mineral Ridge Trail

Idaho

Backcountry Trail

State

Mines of Spain State Recreation Area Trails System

Iowa

Backcountry Trail

City, Town, or County

Minooka Park Trail System

Alabama

Backcountry Trail

National Park Service

Mississippi National River and Recreation Area Water Trail

Minnesota

National Water Trail

U.S. Corps of Engineers

Mississippi River Water Trail

Illinois, Missouri

National Water Trail

Nonprofit

Missouri National Recreational River Water Trail

Iowa, Nebraska, South Dakota

National Water Trail

Bureau of Land Management

Moab Brands (Bar M)

Utah

Backcountry Trail

Bureau of Land Management

Moab Slickrock Bike Trail

Utah

Backcountry Trail

National Park Service

Mohave Water Trail

Arizona, Nevada

National Water Trail

Nonprofit

Mon River / Caperton / Deckers Creek Trails

West Virginia

Backcountry Trail, Frontcountry Trail, Rail Trail

City, Town, or County

Monon Greenway

Indiana

Frontcountry Trail, Rail Trail

City, Town, or County

Monon Rail-Trail

Indiana

Rail Trail

Nonprofit

Monte Sano Nature Preserve Trail System

Alabama

Backcountry Trail, Frontcountry Trail, Rail Trail, Urban Trail

U.S. Fish and Wildlife Service

Monte Vista Walking Trail

Colorado

Frontcountry Trail

City, Town, or County

Montevallo Greenway Trail

Alabama

Backcountry Trail, Frontcountry Trail