Devils Thumb
Cliff in Boulder County, Colorado · on the USGS East Portal quadrangle
39.97804, -105.68445
Maps that show Devils Thumb
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East Portal, CO
USGS topo, 2022
Central City, CO
USGS historical 15-minute topo (1905)
Central City, CO
USGS historical 15-minute topo (1910)
Central City, CO
USGS historical 15-minute topo (1912)
South Half Motor Vehicle Use Map (MVUM)
Arapaho and Roosevelt National Forests & Pawnee National Grassland
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-03 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-01 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).