Thrapp Mountain
Summit in Okanogan County, Washington · on the USGS Thrapp Mountain quadrangle
48.30779, -119.89155
Maps that show Thrapp Mountain
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Thrapp Mountain, WA
USGS topo, 2023
Loup Loup, WA — USGS historical 15-minute topo (1956)
USGS Historical Topo Maps (public domain) · Washington
IFR Enroute Low Altitude Chart L-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute Low Altitude Chart L-13 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute High Altitude Chart H-01 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute Low Altitude Chart L-01 (Alaska) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
Name, class, county and location: USGS Geographic Names Information System (public domain).