It was a fun cultural event consisting of a charreada (Mexican rodeo), a procession, mariachis, folklorico dancers, food, music, and dancing.
Here are a few snaps...
These young ladies were part of a group of seven riding side-saddle and performing some interesting patterns and maneuvers on their horses. Lighting was low, so I wasn't able to get many good shots.
My favorite part was when they entered the arena area one at a time galloping in full speed and then halting the horse abruptly -- it almost looked like they would roll over backwards... All the more impressive done side-saddle.