The 1990 Great American Bash was the second annual Great American Bash professional wrestling pay-per-view (PPV) event produced by World Championship Wrestling (WCW) under the National Wrestling Alliance (NWA) banner, and the sixth annual Great American Bash event overall. It was the final held under the NWA banner, as WCW seceded from the NWA in January 1991. The event took place on July 7, 1990, at the Baltimore Arena in Baltimore, Maryland. This was the third Great American Bash held at this venue after the 1988 and 1989 events. The 1990 event featured the WCW debut of Big Van Vader.