The Tijuana Pop Festival was held in the Bullring on 13 October 1968 . The festival was slated to feature the Animals , Iron Butterfly , Patchwork Security Blanket , the Collectors , the Chicago Transit Authority and the Yellow Payges ; however , the Animals and Iron Butterfly never played . Other issues which marred the event included rumors that the festival had been canceled , long pauses between acts , police activity at the border and at the ring and the political impact of the Tlatelolco massacre only eleven days before . Roger B. Stovold of the '' Teaspoon Door '' called the event " one of the biggest fiascos in pop festival history " and concluded that it " left enough of a black mark that any future pop festival in Mexico is unlikely . "
Tlatelolco massacre
Tlatelolco massacre
Bullring by the Sea