Twelvemile Hole
Basin in Fremont County, Colorado · on the USGS Gribble Mountain quadrangle
38.54305, -105.46861
Maps that show Twelvemile Hole
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Gribble Mountain, CO
USGS topo, 2022
Cover Mtn, CO
USGS historical 15-minute topo (1942)
Cover Mtn, CO
USGS historical 15-minute topo (1948)
IFR Enroute Low Altitude Chart L-10 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-09 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-05 (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).