El Castillo del Terror is a professional wrestling event produced and scripted annually by the lucha Libre promotion International Wrestling Revolution Group (IWRG). The event was established in 2000 and is held in November each year in Arena Naucalpan, IWRG's main arena in Naucalpan, State of Mexico. The annual show features the eponymous main event match; a multi-man Steel Cage Match where the last man in the cage is forced to unmask under Luchas de Apuestas, or "Bet rules". In rival Mexican promotion Consejo Mundial de Lucha Libre (CMLL) the match is referred to as Infierno en el Ring, but is the same concept. The 2015 event marked the fifteenth time that IWRG has held a Castillo del Terror event and the fourth time that Golden Magic has won the mask of an opponent by being the last man to escape the cage; unmasking King Drako, Alan Extreme, Kenshin Kabuki and El Golpelador.

El Castillo del Terror (2011) was a major annually occurring professional wrestling event produced by the International Wrestling Revolution Group (IWRG) that took place on November 3, 2011. The event was the eleventh show held under the El Castillo del Terror banner, with the first taking place in 2000. The main event was the eponymous Castillo del Terror Steel cage match where the last person eliminated would be forced to take off his mask per the match stipulation.