A $50,000 Derby day at the Santa Anita racetrack on February 22, 1937. The crowd in attendance was estimated at 45,000 spectators. Twenty-three horses raced that day, beating out the Kentucky Derby's record of twenty-two starting horses at that time. The $50,000 purse was won by the horse Fairy Hill.
Possibly related to the article “Second Border Gate Planned, Staff at San Ysidro Seeks to Divide Traffic, Customs Men and Town Split on Proposed Site, Tia Juana Races Now Cause Tiresome Delays.” Los Angeles Times, 15 July 1929: 9