The 1997 Halloween Havoc was the ninth annual Halloween Havoc professional wrestling pay-per-view (PPV) event produced by World Championship Wrestling (WCW). It took place on October 26, 1997, from the MGM Grand Garden Arena in the Las Vegas suburb of Paradise, Nevada for the second consecutive year. The event was notable for the WCW Cruiserweight Championship title vs. mask match between Rey Mysterio Jr. and Eddie Guerrero, which has been referred to by commentators and wrestlers alike as one of the best matches both of WCW and of the 1990s.