Randonneuring is a style of bicycle riding that requires covering long-distances over an unmarked course of challenging terrain within a generously allotted time period of almost continuous riding. Riders are not to compete against their fellow cyclists, but to compete only against their own personal best, the weather and the mind's desire for sleep. Skills in self-sufficiency, bicycle mechanics, night-riding and endurance are all valued over ability to cycle at racing speeds or with racing strategies.