Get your heart pumping during one of five running races. Choose between the 50K, 100K, 100-mile, and six-hour evening fun run (the truly brave can register for as many as they like). Not enough of a challenge? Sign up for the 24-hour expedition: Flying solo or with a relay team, you have 24 hours to run as many laps as you can on a 7.14-mile, mixed-terrain course. Stop between laps to refuel with provided food and energy drinks. Sat 6:30 a.m.-Sun 3 p.m.