Sign Island
Island in Canyon County, Idaho · on the USGS Walters Butte quadrangle
43.29350, -116.51373
Maps that show Sign Island
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Walters Butte, ID
Detailed map of terrain, trails and roads
USGS topo, 2023
Murphy Subregion Travel
North — BLM Idaho
Boise District Map
Central — BLM Idaho (2019)
IFR Enroute Low Altitude Chart L-11 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-13 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-03 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-01 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-01 (Alaska)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).