The Duel is the thirteenth season of the MTV television series Real World/Road Rules Challenge. It took place in Búzios, Brazil, with former cast members from MTV series The Real World and Road Rules competing, along with several cast members from the previous Challenge, Fresh Meat. The host of this season was T. J. Lavin.
This season premiered on October 12, 2006 and differed from previous seasons in that no teams were assigned. The surviving male and female cast member would win $150,000 each.