Folly Lake
Lake in Lake County, Minnesota · on the USGS Silver Island Lake quadrangle
47.68238, -91.19011
Maps that show Folly Lake
Get them in the map app
Silver Island Lake, MN
Detailed map of terrain, trails and roads
USGS topo, 2022
Silver Island Lake
Forest Service topo with road numbers
Forest Service FSTopo 7.5-minute quad
Cramer, MN
Old map for history, not navigation
USGS historical 15-minute topo (1955)
Superior National Forest
Forest Service forest map
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 High Altitude Chart H-02 (U.S.)
FAA, 2026-10-29
Nearby
Name, class, county and location: USGS Geographic Names Information System (public domain).