ArkyKenny from Farmington, AR on 7/11/2012 8:21:45 AM:
It's a railroad bed following a river for most of it's course, with protetion from wind, and the absence of automobile traffic: It doesn't get much better than that.
I heard that in Hawaii, they will rent you a bicycle and take you to the top of a volcano. From there, you can coast down to the bottom without ever pedaling.
It's either that, or you need to consider getting a motor.