Lewis And Clark Monument features 5 miles of hiking trails near Council Bluffs, IA.
Take Broadway st. to 16th st. and turn north. Turn right on Big Lake rd. where you should watch out for the low R.R. bridges if you have your bikes on the roof of your car. Left at Mynster Springs rd. and then another left on Rainbow rd. to the monument entrance.
http://www.tripleblaze.com/trail.php?c=3&i=426