Why Bexar County Hosts Texas' Biggest Rodeo Bexar County hosts the biggest rodeo in Texas history and almost no one knows why. The San Antonio Stock Show and Rodeo started in 1950 to save Texas ranching after the drought nearly destroyed it. Now it raises over $200 million for Texas youth scholarships. Drop your county below—does your rodeo compare to Bexar's Bexar County, San Antonio rodeo, Texas rodeo, San Antonio Stock Show, PRCA rodeo, Texas ranching, Bexar County history, San Antonio events