Frog Spring (historical)
Spring in Clark County, Idaho · on the USGS Upper Red Rock Lake quadrangle
44.50436, -111.74357
Maps that show Frog Spring (historical)
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Upper Red Rock Lake, MT-ID
USGS topo, 2024
Upper Red Rock Lake, MT
USGS historical 15-minute topo (1950)
South Gravelly Mountains Motor Vehicle Use Map (MVUM)
Beaverhead-Deerlodge National Forest (2017)
Ashton/Island Park Winter Travel Map
Caribou-Targhee National Forest
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
Name, class, county and location: USGS Geographic Names Information System (public domain).