Great River Road
We parked at the Piasa Bird, pronounced (PIE-ah-SAW) if you're from IL! To get there from the south (MO side) cross the famous, 367, Clark Bridge (supposedly a marvelling feat that was on the Discovery channel) and turn left. It's approx 2 miles to the parking lot--you won't miss the bird up on the cliffs on the right.
The first 3-4 miles of paved path parallel the highway and are a little rough, and littered with sticks and rocks. Don't let this discourage you. The path will change into a bike lane on the road for about 8 miles before you reach Grafton. In Grafton, you follow signs onto a road along the river, past the marina and then back across the highway. You then do some small, but fun rolling hills that lead you up into a park overlooking the river. After this, you head out into beautiful, quiet farm land until you get to Pere Marquette park. We stopped here at the camping/picnic area--but I believe you can continue farther up into the park. There is supposed to be a Lodge with an excellent buffet on weekends.
When we turned around to head back, we discovered we had been doing a slow gradual climb--so it was a nice cruise back to the car. Where the bike path is on the road, there is a bike path on both sides--follow the signs to cross back over.
There are plenty of restaurants and a casino in Alton to entertain you when you finish.
"Well-behaved women seldom make history." --Laurel Thatcher Ulrich
'09 Trek WSD 2.1 with a Brooks B-68 saddle
'11 Trek WSD Madone 5.2 with Brooks B-17