Another New Balance fan here. I have very narrow feet and I also like to walk/hike a lot.

Randi--I have hiking boots for any significant amount of walking. They are the short kind that just cover my ankles. They're called Day Hikers. The ankle support really makes a difference when you're going to be walking for over an hour.

A good hiking boot takes a while to break in, but when it does it molds to YOUR foot.

Good luck!