According to Official Guinness Records,
The greatest distance wakeboarding in 24 hours by a team is 819.49 km (509.2 mi) by Neill Barker, Nick Binkley, Adam Errington, Tony Finn, Tom Fooshee, Pete Kennedy, Mike Olson, Jimmy Redmon, Brian Wheeler and Amber Wing (all USA) at Wake Nation Cincinnati in Cincinnati, Ohio, USA, from 25-26 June 2010.
The team wakeboarded laps around a 564 m-long circuit at the Wake Nation Cincinnati facility, which allows wakeboarders to ride around the lake on an overhead cable system, as opposed to being towed by a boat. The competitors combined to complete a total of 1,453 laps. The record total does not include laps during which the rider fell, as the organizers chose not to count those distances toward the logbook.
For a complete list of 2010 records, please visit 2010 Guinness Records in United States.