Out of caution for our guests, animals, and staff, we will not be hosting our annual Boo at the Zoo event this year. As a family-friendly, outdoor, safe setting, we still want to get spooky with you. You're invited to come dressed in Halloween costumes (and masks!) to celebrate Sloth-oween! Enjoy a self-guided walk around the zoo to find our five sloth-themed haunted houses, including “Franken-sloth’s Fort,” where you will learn some creepy facts about sloths. Make sure to tag us in your photos, so we can repost on our social media channels!

We are excited to partner with our friends at The Sloth Conservation Foundation in Costa Rica and the Panamerican Conservation Association in Gamboa, Panama, to bring awareness to International Sloth Day on October 20 and to celebrate Sloth-oween. Please visit their websites to learn more about how you can support sloths in the wild.

On your visit, don’t miss Nigel’s Big Adventure! Follow the clues to meet some of Nigel’s, our seven-year-old burrowing owl, friends and learn some fascinating facts along the way. When you get to the final clue, scan the QR code to get to Nigel’s personal web page!

*Advance reservations are required and guests must adhere to safety guidelines including face coverings for guests two years of age and over. San Francisco Zoo & Gardens is home to two sloths who reside in indoor habitats and will not be available to see. Due to COVID, all of our indoor habitats are closed.