Tres Marias
Island in Kenedy County, Texas · on the USGS Maria Estella Well quadrangle
26.94117, -97.51804
Maps that show Tres Marias
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Maria Estella Well, TX
USGS topo, 2022
Saltillo Ranch, TX
USGS historical 15-minute topo (1923)
Saltillo Ranch, TX
USGS historical 15-minute topo (1956)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-20 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-07 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-21 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).