The area of Giant City State Park is 16.187 square kilometers.
The area of Gay City State Park is 6,349,517.7267456 square meters.
The area of Traverse City State Park is 190,202.25185280002 square meters.
The area of Sleeping Giant Provincial Park is 243.91 square kilometers.
Kankakee River State Park (look for the Rock Creek area for the canyon, forested areas are south of the river and near the Potowatomi Campgrounds). Matthiessen State Park - pretty much the whole park is a forested canyon. Starved Rock State Park - lots of forest, NUMEROUS canyons. Apple River Canyon State Park Giant City State Park - South of Carbondale off State Highway 51 and west of Makanda. Beautiful bluffs, forests, and it is near the Illinois wine country in the Cobden and Anna area.
The area of State Forest State Park is 286.671 square kilometers.
The area of Eastside City Park is 27,316.2808512 square meters.
The area of Roxborough State Park is 13.512 square kilometers.
The area of Sesquicentennial State Park is 5,742,489.2633856 square meters.
The area of Meaher State Park is 5,370,178.4725248 square meters.
The area of Onaway State Park is 639,403.3147392 square meters.
The area of Douthat State Park is 18.397 square kilometers.
The area of Pokagon State Park is 5,099,039.092224 square meters.