El Castillo del Terror (2004)

The 2004 El Castillo del Terror (Spanish for "The Tower of Terror") was a major lucha libre event produced and scripted by the Mexican International Wrestling Revolution Group (IWRG) professional wrestling promotion on October 31, 2004. The 2004 El Castillo del Terror was the fourth ever IWRG El Castillo del Terror event held. The main event was the eponymous Castillo del Terror (Spanish for "Tower of Terror") Steel cage match where the last person eliminated would be forced to take off his wrestling mask or have his hair shaved off as a result of the loss.

Due to incomplete records of the main event, the only known participants was the winner Black Dragon and Mega as the loser of the El Castillo del Terror main event. The remaining Castillo del Terror participants are unknown.