Around christmas time there is a festival in San Jose with a big parade, rodeo and market. I dont remember the name, but they have one every year.
I have never seen so many horses in my life! There must have been several thousands... All the people had traditional costumes, people in all ages where particepating with music and dancing (with or without horses...).
if you happen to go to San José around Christmas, don't miss the Carnival... I have bothered you enough ;-) with it in my travelogues...