I've never run on the roofing material, but never been a fan of pics I've seen. Always seem's to curl at the edges and will move when you maneuver on it unless its pegged down. Others may have better opinions on that. If you think this may be at the least a 1 year long running area think about pavers for hard surface area's. You could re-use them down the road if you change your mind around the backyard landscapes.