The centennial trail is good between Willow Springs road and Ruby St. in Joliet. It diverges from the I&M canal towpath trail north of 135th street. Make sure you get on the trail which is south of the Des Plaines but north of the Cal Sag. If you turn off at the Speedway on Willow Springs road just north of the bridge which crosses both waterways, there is a remnant of the older road to the west of the new bridge's foundation which crosses the Des Plaines. At its end you will find the trailhead. It's probabaly marked but I never looked because I was already on the trail coming from the southwest.
You can see the double I&M canal trail going northeast and southwest from that bridge in Willow Springs but it does not go through at route 83, and if you got back on it in Lemont it would not go through to 135th street. It was very overgrown when I tried to go west from Lemont road a couple of months ago. You can take it from willow springs to 83 and then go north on 83 on the west side, where you'll see Centennial trail, but you can also just take Centennial trail from Willow Springs to Joliet.
Last edited by garage sale GT; 08-22-09 at 07:55 PM.