Onion Mountain

Summit in Capitol County, Connecticut · on the USGS Collinsville quadrangle

41.86076, -72.87903

Maps that show Onion Mountain

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Collinsville, CT — USGS 7.5-minute topo (2024)

Collinsville, CT

Detailed map of terrain, trails and roads

USGS topo, 2024

Granby, CT — USGS historical 15-minute topo (1892)

Granby, CT

Old map for history, not navigation

USGS historical 15-minute topo (1892)

Bureau of Land Management Eastern States Overview map — BLM Eastern States (2019)

Bureau of Land Management Eastern States Overview map

BLM Eastern States (2019)

IFR Enroute Low Altitude Chart L-33 (U.S.) — FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-33 (U.S.)

FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-34 (U.S.) — FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-34 (U.S.)

FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-32 (U.S.) — FAA, 2026-10-29

IFR Enroute Low Altitude Chart L-32 (U.S.)

FAA, 2026-10-29

IFR Enroute High Altitude Chart H-11 (U.S.) — FAA, 2026-10-29

IFR Enroute High Altitude Chart H-11 (U.S.)

FAA, 2026-10-29

IFR Enroute High Altitude Chart H-10 (U.S.) — FAA, 2026-10-29

IFR Enroute High Altitude Chart H-10 (U.S.)

FAA, 2026-10-29

IFR Enroute High Altitude Chart H-12 (U.S.) — FAA, 2026-10-29

IFR Enroute High Altitude Chart H-12 (U.S.)

FAA, 2026-10-29

Nearby

Name, class, county and location: USGS Geographic Names Information System (public domain).