Is different, beautiful. There's actually more trails off River rd. When you see a "game farm" sign you need to turn the opposite way on boathouse road.. you want to go north on boathouse. There is only 1 small hard to see sign. All the western trails are here. Beware of Ticks, spray and keep to center of trails. Prairie Creek was a nice short trail with a pond outlook in some semi-dense forest. Henslow trail is the long one in the west of the park. You are out in the prairie for the whole thing, bring water, the sun will destroy you! But it is worth it.... mowed grass trail that goes right thru the heart of the prairie.
Cheryl O. on Buffalo Viewing Trail
Easy trail but no shade so bring the sunscreen and tick spray. Main trail is gravel but other loops are cut prairie grasses, some walk-thru gates. Some of the east side bunkers are open for exploring. Cow pasture next to the trail to the iron bridge, so you may have company, they will follow you, including 2 that escaped and were actually on the trail. Good for birding and butterfly watching.
4 trail heads the south patrol road trail head is the best because you go through one of the retired bunker fields for the joliet arsenal that made ammo and explosives since world war 2 trail maps are located on http://www.fs.usda.gov/midewin. what you can do there is hike bike and horse back riding but you have to bring your own horse.
Midewin continues to be a work in progress as the federal government is turning much of the former Joliet Arsenal into tallgrass prairie. In fact the most interesting part of the area are the decaying army structures and concrete bunkers one can see on a day visit. There are several trails in the area and all are pretty easy though the length can be challenging to some. My visit included hiking a 13 mile loop formed by the Group 63, Twin Oaks, and Bunker Field trails. Though the area is federal land administered by the United States Forest Service , it is a sparsely visited area.