Whizzer is an Anton Schwarzkopf Speedracer roller coaster located at Six Flags Great America in Gurnee, Illinois. It was one of two identical roller coasters built for the Marriott Corporation for each of their “Great America” parks at their debut in 1976, with an identical version of the Whizzer at California's Great America. Marriott continued to operate both parks until selling them in 1984. Manufactured by Anton Schwarzkopf of Germany, the two rides were the last “Speedracer” models ever built. The California Whizzer was dismantled in 1988 while the Illinois Whizzer remains in operation, as one of only two Speedracers still in existence worldwide.