Trigg Lake
Reservoir in Bastrop County, Texas · on the USGS Lytton Springs quadrangle
30.06825, -97.57427
Maps that show Trigg Lake
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Lytton Springs, TX
USGS topo, 2022

Montopolis, TX
USGS historical 15-minute topo (1955)

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

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).