Sourgrass Summit
Gap in Yamhill County, Oregon · on the USGS Midway quadrangle
45.09622, -123.74400
Maps that show Sourgrass Summit
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Midway, OR — USGS 7.5-minute topo (2024)
USGS Topo Maps (public domain) · Oregon
Public domain
Grand Ronde, OR — USGS historical 15-minute topo (1955)
USGS Historical Topo Maps (public domain) · Oregon
Public domain
Spirit Mtn, OR — USGS historical 15-minute topo (1942)
USGS Historical Topo Maps (public domain) · Oregon
Public domain
IFR Enroute Low Altitude Chart L-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute High Altitude Chart H-03 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute High Altitude Chart H-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
IFR Enroute Low Altitude Chart L-01 (Alaska) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Public domain
Name, class, county and location: USGS Geographic Names Information System (public domain).