Mason Lake
Reservoir in Fulton County, Illinois · on the USGS Fiatt quadrangle
40.52705, -90.13586
Maps that show Mason Lake
Get them in the map app
Fiatt, IL
Detailed map of terrain, trails and roads
USGS topo, 2024
Canton, IL
Old map for history, not navigation
USGS historical 15-minute topo (1912)
Continental Glaciation Map - Tule Springs Fossil Beds National Monument
National Park Service Maps · Tule Springs Fossil Beds National Monument
Bureau of Land Management Eastern States Overview map
BLM Eastern States (2019)
IFR Enroute Low Altitude Chart L-27 (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).