Real World/Road Rules Challenge: Battle of the Sexes 2 is the 9th season of the MTV reality game show The Challenge (at the time known as Real World/Road Rules Challenge). The season directly follows ' and took place in Santa Fe, New Mexico.
Battle of the Sexes 2 is the first season of The Challenge to be a sequel from an earlier season, the show's sixth season, . A casting special titled "He Says She Says: The Battle for the Battle of the Sexes 2" aired on September 27, 2004. Battle of the Sexes 2 premiered on October 4, 2004, and concluded on January 31, 2005.
Before each challenge, each team choose three leaders. If the team won, those three leaders form the inner circle and decide whom to vote from their team; if the team lost, the rest of the team form the inner circle and vote off one of their three leaders. No life-shields were used during this season.
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The reunion special, Battle of the Sexes 2: Reunion - Secrets from Elimination Hill, was aired on January 31, 2005, and was hosted by VJ La La Vazquez.