Why go
The rodeo offers a direct look at competitive western sports, while the livestock side connects the event to Texas agriculture and its youth scholarship tradition. It is a different cultural outing from the missions or River Walk and can fill much of a day if you include several components.
The full story
The San Antonio Stock Show & Rodeo began in 1950 and grew from a rodeo into a broader event centered on livestock, western culture and entertainment. The older account describes rodeo competitions, livestock displays, shopping and concerts following some rodeo sessions. It also records a scholarship program begun in 1984 for students pursuing agriculture, showing that the event has a role beyond the arena. Venues and the mix of activities have changed over time, so an earlier building name is a poor way to plan a current visit. Start with the latest event map and program. If you chiefly want the competition, choose a rodeo session and allow time to reach your seat. If livestock is the draw, check when the relevant displays or judging take place. Concerts and other activities can turn a focused outing into a longer visit, but their lineup and admission arrangements need a current check.