Check out the BUFF Group (Buckeye United Flyfishers) - they have info on the Mad River which is right by you in Columbus - http://www.buckeyeflyfishers.com/

There is also a TU Chapter for the Mad River and they have maps on their site as well - http://www.tumadmen.org/index.html

There is also a great fly shop there that will have info about the local waters - http://www.madriveroutfitters.com/default.aspx

And don't forget to hit the Fly fish Ohio site for more info - http://www.flyfishohio.com/index.htm

Good luck!