The area of Matthiessen State Park is 6,879,655.91808 square meters.
Matthiessen State Park was created in 1943.
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 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.
The area of Maybury State Park is 3,820,232.4627456004 square meters.
The area of Hoeft State Park is 1,218,103.7831424 square meters.
The area of Torreya State Park is 48.562 square kilometers.