SteveK from Saint Louis, MO on 7/4/2012 5:12:50 PM:
I have never been to those trails. However, I have been to the Wabash Trace Nature Trail that runs for about 65 miles in SW Iowa. It reminds me a lot of the Katy Trail section Boonville to Clinton where you get away from the river and have steeper grades. There are small sections around a few of the towns that are paved but the surface is similar to the Katy although generally a little less compacted.
On Sept. 15, they are running a 1/2 and full marathon on it from Malvern, Imogene, and Shenandoah, IA, which they hope to turn into an annual event. I will be there and would really like to see a similar event on the Katy someday.