Sentry Mountain
Summit in Bandera County, Texas · on the USGS Seco Pass quadrangle
29.66668, -99.42960
Maps that show Sentry Mountain
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Seco Pass, TX
USGS topo, 2022
Tarpley, TX
USGS historical 15-minute topo (1956)
U.S. Fish and Wildlife Service Alligator Snapping Turtle Range (2024)
Fish & Wildlife Service Refuge Maps (public domain)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-19 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-07 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).