Nonprofit

Huntington Museum Nature Trails

West Virginia

Backcountry Trail

Nonprofit

Huron River Water Trail

Michigan

National Water Trail

City, Town, or County

Hyde Park Heritage Greenway Trail System

New York

Frontcountry Trail, Urban Trail

USDA Forest Service

Ice Age Trail in Langlade County

Wisconsin

Backcountry Trail

U.S. Fish and Wildlife Service

Icicle Creek Nature Trail

Washington

USDA Forest Service

Idaho Giant Red Cedar

Idaho

Backcountry Trail

USDA Forest Service

Ides Cove Loop

California

Backcountry Trail

City, Town, or County

Illinois Prairie Path

Illinois

Rail Trail

USDA Forest Service

Illinois River

Oregon

Backcountry Trail

USDA Forest Service

Inaja Memorial Nature

California

Backcountry Trail

USDA Forest Service

Independence Creek Trail

Idaho

Backcountry Trail

State

Indian Nations

Oklahoma

USDA Forest Service

Inspiration Point

Illinois

Backcountry Trail

USDA Forest Service

Interloken NRT

New York

Backcountry Trail

City, Town, or County

International Forest of Friendship Trail

Kansas

Backcountry Trail

City, Town, or County

Inwood Hill Park Orange Trail

New York

Backcountry Trail

Bureau of Land Management

Iron Hills Trail System

Utah

Backcountry Trail

USDA Forest Service

Iron Mtn. Trail #242/Cascade Falls Trail #242-A

Montana

City, Town, or County

Iron Ore Heritage Trail

Michigan

Rail Trail

City, Town, or County

Island Line Trail

Vermont

Rail Trail