it says 18 miles but you back track so it is a bit longer. Start at Rte B and Tanner bridge rd. and make stay on tanner till the end. Then left onto Rte E to the T at the end then make a left on to B and take the turn off to Tanner bridge. It is not very well marked so you have to be paying attention. Then just take a right at the yeild sign and head on back to Rte B intersection. Couple of good S turns on E ... :)