Grass Hill
Summit in Teton County, Montana · on the USGS Castle Reef quadrangle
47.71688, -112.74142
Maps that show Grass Hill
Get them in the map app
Castle Reef, MT
Detailed map of terrain, trails and roads
USGS topo, 2024
Castle Reef
Forest Service topo with road numbers
Forest Service FSTopo 7.5-minute quad
Arsenic Mountain
Forest Service topo with road numbers
Forest Service FSTopo 7.5-minute quad
Rocky Mountain Ranger District Over-Snow Vehicle Use Map
Where snowmobiles are allowed
Helena-Lewis and Clark National Forest (2019)
Choteau 30x60 Land Ownership (BLM Surface Management)
Land Ownership Maps from BLM Data · Montana
Helena-Lewis and Clark National Forest
West — Forest Service forest map
Lolo National Forest
Forest Service forest map
IFR Enroute Low Altitude Chart L-13 (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
Name, class, county and location: USGS Geographic Names Information System (public domain).