Greatest distance cycled unpaced in 12 hours (WUCA) (male)

The greatest distance cycled solo and unpaced in 12 hours was 475.26 km (295.31 mi) by Marko Baloh (Slovenia) at the Montichiari Velodrome in Brescia, Italy, on 8 October 2010. He completed 1,901 full laps of the 250 m (820 ft 2.5 in) course in the 12 hours. Baloh continued cycling and went on to break the 24-hour record in the same attempt. The record was verified by the World UltraCycling Association (previously UltraMarathon Cycling Association).

The World UltraCycling Association is the leading international organization dedicated to ultracycling. The WUCA governs and certifies record attempts in several categories, including cross-country, cross-state/province as well as fixed-distance attempts (100 miles, 200 miles, 1,000 km) and fixed-time attempts (6 hours, 12 hours, 24 hours). Also, the WUCA governs and certifies attempts in two categories called HAMR (Highest Annual Mileage Ridden) and 100,000 Miles, both recognized by Guinness World Records.