Semi-Centennial Geyser
Spring in Park County, Wyoming · on the USGS Obsidian Cliff quadrangle
44.78615, -110.73986
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Obsidian Cliff, WY
USGS topo, 2021
Mammoth, WY
USGS historical 15-minute topo (1958)
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
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).