Well, I have heard wonderful things about a place called Findlay Dogpark in Ohio. Check in with some Ohio folks!

this is all I could find:

http://www.hancockparks.com/dogpark-app.pdf

Oops, another one:

http://geocities.com/granvilledogpark/


AND a bunch more - this should help get you started!
http://www.petvr.com/index.php/pages...endlyohio.html