Blank Ridge
Ridge in Boone County, Iowa · on the USGS Madrid NW quadrangle
41.94892, -93.90872
Maps that show Blank Ridge
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Madrid NW, IA
USGS topo, 2022
Madrid, IA
USGS historical 15-minute topo (1911)
Madrid, IA
USGS historical 15-minute topo (1914)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-12 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-05 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).