El Castillo del Terror (2008) was a professional wrestling event, their annual El Castillo del Terror event produced by the International Wrestling Revolution Group (IWRG). IWRG has held an Castillo del Terror branded show since 2005, usually late in the year, making this year's event the fourth overall event in the series. The event took place on November 3, 2008, at Arena Naucalpan in Naucalpan, State of Mexico, IWRG's main arena. The main event was the eponymous Castillo del Terror (Spanish for "Castle of Terror") Steel cage match where the last person eliminated was forced to unmasked per the match stipulation. In the end the ten-man match saw Mascara Ano 2000, Jr. defeat Arlequín Amarillo, forcing him to unmask after the match.