At this annual event, learn about the Pacific Northwest’s most valuable and misunderstood mollusk—the yellow-greenish banana slug—through a fun-filled day of sluggy activities the whole family will enjoy.

Take a tentacled tram, make your own tentacles and slide down a soapy track to victory in the Human Slug Race! Plus, meet critters up close at Trailside Encounters, take selfies as a flower and find the giant slug statue to play on. Psst…find as many slugs as you can in the Slug Tank or follow the story on the Snail Trail and appreciate nature at a slower pace.

Activities are free with admission. To celebrate banana slugs, trams will be equipped with tentacles as they make their way through the wildlife park’s 435-acre Free-Roaming Area on an animal-watching Discovery Tram Tour.