The Challenge: The Duel

Real World/Road Rules Challenge: The Duel is the 13th season of the MTV reality game show, The Challenge (at the time known as Real World/Road Rules Challenge). This is the first edition of The Duel series, with The Challenge: The Duel II following in 2009.

The Duel 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, The Challenge: Fresh Meat. The season differed from previous Challenge seasons in that no teams were assigned, as it was every man and woman for themselves. The surviving male and female cast member would win $150,000 each. The season was watched by a total of 83 million viewers.

This season was preceded by The Challenge: Fresh Meat and followed by The Challenge: The Inferno 3.