Zoo Boo at San Antonio Zoo

San Antonio Zoo kicks off ZOO BOO! presented by Valero Benefit for Children, a fun, non-scary Halloween event for the entire family. Little ghouls and goblins are encouraged to wear their best costume to participate in a daily costume contest with a chance to win a zoo prize pack. Children of all ages and adults are welcomed to don non-scary, family-friendly costumes. Costume masks are only permitted for children under the age of 12. ZOO BOO! is included with zoo standard admission and FREE for Zoo Annual Pass Holders and Monthly Members.