The 1975 Winston Western 500 was a NASCAR Winston Cup Series racing event that took place on January 19, 1975, at Riverside International Raceway in Riverside, California. A companion race known as the Permatex 200, in the Late Model Sportsmen Series, would be held one day prior to this event on the same track. The 1975 NASCAR Winston Cup Series would jump start Richard Petty into a different breed of stock car driver; even though his 1975 Dodge Charger muscle car vehicle would be as comfortable to drive on the race track as a boxcar on the railroad tracks.