Boo at the Zoo

Boo at the Zoo is a family-friendly Halloween event at the Saint Louis Zoo running October 9–30, 2026. It features non-scary, kid-friendly Halloween festivities across an expanded footprint, including decorations and animals to see on Historic Hill, and it is not a trick-or-treating event. The lineup includes attractions new to Boo such as Primate House and Dinoroarus, plus a 4D Theater experience with Spookley’s 4D Jamboree; note that some animal exhibits and experiences have time restrictions. Tickets are $13 for Zoo Members and $16 for General Admission, with free admission for children ages 0-23 months; parking is free on Zoo lots when available.