Olson Lake
Lake in Big Stone County, Minnesota · on the USGS Dismal Swamp quadrangle
45.40806, -96.33521
Maps that show Olson Lake
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Dismal Swamp, MN
USGS topo, 2022
Ortonville, MN
USGS historical 15-minute topo (1953)
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-14 (U.S.)
FAA, 2026-10-29
IFR Enroute Low Altitude Chart L-12 (U.S.)
FAA, 2026-10-29
IFR Enroute High Altitude Chart H-02 (U.S.)
FAA, 2026-10-29
Name, class, county and location: USGS Geographic Names Information System (public domain).