What began as a ranching family's Sunday pastime of horse racing, with cheering crowds and thundering hooves on dusty roads, would give way to the Alameda County Fair that we know today. The Bernal family built the original racetrack in 1859 on their 52,000-acre ranch, which was part of the Northern California land grant, Rancho Valle de San Jose. Looking to turn his newly acquired racetrack into profit, businessman Rodney G. MacKenzie approached...