Porphyry Basin
Basin in Hinsdale County, Colorado · on the USGS Wetterhorn Peak quadrangle
38.10833, -107.50339
Maps that show Porphyry Basin
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Wetterhorn Peak, CO
USGS topo, 2022
Ouray, CO
USGS historical 15-minute topo (1902)
Ouray, CO
USGS historical 15-minute topo (1904)
Mountain Division Motor Vehicle Use Map (MVUM)
Grand Mesa, Uncompahgre and Gunnison National Forests (2025)
Gunnison District Motor Vehicle Use Map (MVUM) (South)
Grand Mesa, Uncompahgre and Gunnison National Forests (2025)
IFR Enroute Low Altitude Chart L-09 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-11 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-04 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-03 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).