Grass Lake
Lake in Sanders County, Montana · on the USGS Mount Headley quadrangle
47.69210, -115.28489
Maps that show Grass Lake
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Mount Headley, MT
USGS topo, 2024
Thompson Falls, MT
USGS historical 15-minute topo (1937)
Thompson Falls, MT
USGS historical 15-minute topo (1957)
Plains/Thompson Falls RD Motor Vehicle Use Map (MVUM)
Lolo National Forest
Plains Ranger District OSVUM
Lolo National Forest
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
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).