I live in a great running/cycling neighborhood until you try to run barefooted. All the roads are chip-seal. And I wasn't kidding about the tender foot part in my screen name! Yesterday I went and ran in a park on a concrete trail around a lake. Wow, that felt great! The surface was pretty smooth and the trail was very undulating with lots of camber changes. Pretty perfect for training I would say! Just had to watch out for the occasional coyote poop (the plum seeds are a give-away that it isn't Fido). Now my biggest challenge is not ramping mileage up too fast .