http://records.fai.org/gliding/current.asp?id1=DU&id2=1

Current record:

Free Distance : 627.60 km
Date of flight: 09/07/2004
Pilot: Leonardo R. BENETTI-LONGHINI (USA)
Course/place: Zapata, TX (USA)
Glider: Silent II Registered 'N210DU'

New record:

Free Distance : 783.75 km
Date of flight: 19/07/2008
Pilot: Gary Osoba (USA)
Course/place: Zapata, TX (USA)
Glider: Woodstock