Sourdough Ridge
Ridge in Asotin County, Washington · on the USGS Pinkham Butte quadrangle
46.23785, -117.39305
Maps that show Sourdough Ridge
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Pinkham Butte, WA
USGS topo, 2023
Saddle Butte, WA — USGS historical 15-minute topo (1943)
USGS Historical Topo Maps (public domain) · Washington
Saddle Butte, WA — USGS historical 15-minute topo (1946)
USGS Historical Topo Maps (public domain) · Washington
Map 21 Motor Vehicle Use Map (MVUM) — Umatilla National Forest (2026)
Forest Service Maps (public domain) · Umatilla National Forest
Index Over-Snow Vehicle Use Map — Nez Perce-Clearwater National Forests
Forest Service Maps (public domain) · Nez Perce-Clearwater National Forests
IFR Enroute Low Altitude Chart L-11 (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-03 (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)
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).