| Group 1 race | |
| Location | Randwick Racecourse, Sydney, Australia |
|---|---|
| Inaugurated | 1945 |
| Race type | Thoroughbred - flat |
| Race information | |
| Distance | 1,600 metres |
| Surface | Turf |
| Track | Right-handed |
| Qualification | Horses three years old and older |
| Weight | Weight for Age |
| Purse | A$500,000 (2016) |
| Bonuses | Winner exemption from a ballot on the Epsom Handicap |
The Colgate Optic White Stakes, registered as the George Main Stakes, is an Australian Turf Club Group 1 Thoroughbred horse race run under Weight for Age conditions, over a distance of 1600 metres at Randwick Racecourse, Sydney, Australia in September. Total prize money for the race is A$500,000.
The race is named after George Main, a former chairman of the Australian Jockey Club. George Main lived with his wife Mary on Retreat, a grazing property west of Cootamundra on the southwest slopes of New South Wales. He bred racehorses and ran sheep.
The winner of the George Main is exempt from a ballot on the Epsom Handicap, and horses who run well head for the Epsom.
† Not held because of outbreak of equine influenza