Midewin National Tallgrass Prairie maps
National forest in Illinois, managed by the USDA Forest Service.
Cartahaven has 4 maps covering Midewin National Tallgrass Prairie: 4 USGS 7.5-minute topo quads. All of them are free. Download one to your phone and the map app shows your GPS position on it with no cell signal, along with your tracks, placemarks and, in the US, who manages the land around you.
Check current conditions, closures and regulations with the USDA Forest Service before you go. Maps are aids, not guarantees.
Where each map covers
Maps

Channahon, IL — USGS 7.5-minute topo (2024)
USGS Topo Maps (public domain) · Illinois
Public domain

Elwood, IL — USGS 7.5-minute topo (2024)
USGS Topo Maps (public domain) · Illinois
Public domain

Symerton, IL — USGS 7.5-minute topo (2024)
USGS Topo Maps (public domain) · Illinois
Public domain

Wilmington, IL — USGS 7.5-minute topo (2024)
USGS Topo Maps (public domain) · Illinois
Public domain
USGS quads are listed when part of the sheet falls inside the boundary. Boundary: USDA Forest Service, simplified.