Big Round Valley
Basin in Nye County, Nevada · on the USGS Black Rock Summit quadrangle
38.55549, -115.87615
Maps that show Big Round Valley
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Black Rock Summit, NV
USGS topo, 2021
Portuguese Mtn, NV — USGS historical 15-minute topo (1968)
USGS Historical Topo Maps (public domain) · Nevada
IFR Enroute Low Altitude Chart L-09 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute Low Altitude Chart L-11 (U.S.) — FAA, 2026-10-29
FAA IFR Enroute Charts (public domain)
IFR Enroute High Altitude Chart H-04 (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)
Name, class, county and location: USGS Geographic Names Information System (public domain).