The Drop-off

Three Prong Mountain, ID

Detailed map of terrain, trails and roads

USGS topo, 2024

Three Prong Mountain

Forest Service topo with road numbers

Forest Service FSTopo 7.5-minute quad

West Fork Ranger District Motor Vehicle Use Map (MVUM)

Forest roads and trails open to vehicles

Bitterroot National Forest (2026)

Nez Perce Pass 30x60 Land Ownership (BLM Surface Management)

Land Ownership Maps from BLM Data · Idaho

South Over-Snow Vehicle Use Map

Where snowmobiles are allowed

Bitterroot National Forest

Bitterroot National Forest

Forest Service forest map

All Sites Map - Nez Perce National Historical Park

National Park Service Maps · Nez Perce National Historical Park

Nez Perce-Clearwater National Forest

Forest Service forest map

Index Over-Snow Vehicle Use Map

Where snowmobiles are allowed

Nez Perce-Clearwater National Forests

Idaho Public Land Hunting Map: Central Mountains

Cartahaven Maps · Idaho

Montana Public Land Hunting Map: Southwest

Cartahaven Maps · Montana

Idaho Public Land Hunting Map: Panhandle

Cartahaven Maps · Idaho

IFR Enroute Low Altitude Chart L-11 (U.S.)

FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-13 (U.S.)

FAA, 2026-10-29

IFR Enroute High Altitude Chart H-03 (U.S.)

FAA, 2026-10-29

IFR Enroute High Altitude Chart H-01 (U.S.)

FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-01 (Alaska)

FAA, 2026-10-29