I did about 17 miles this afternoon - went out sight seeing. I actually wound up back at the Narrows of the Harpeth state park. This time I did about a mile's worth of hiking and went up to the ridge where you can see the river on one side, and the river on the other - some places the crest of the ridge is only a few feet across. Also went and checked out where the water exits on the other side of the ridge. (the narrows is a 5 mile loop of river that travels around a ridge and when it's back to back w/ the ridge between, it is 200' from it's self - a tunnel was bored through the ridge to run a forge) It's a great reason to ride with MTB shoes on... you get to do a little sight-seeing if you want to.

outlet of the tunnel
hiking traik
up on the ridge