Anybody know where the "Old Plank Trail" is? Southwest of Chicago, I think.

I've gone on >10 match.com dates over the winter. Two of the guys were named Mario. I didn't want to date either Mario. But both Marios talked about this trail as great for biking. I don't want to ask either Mario, for obvious reasons! I'll find it some other way. Thought maybe somebody here had heard of it.