WATERSHED WEEKENDS Free family fun! Go with the flow to the WaterShed every third Saturday of each month from 10AM – 1PM for fun activities the whole family can enjoy! No pre-registration required. WaterShed Birthday Bash! SATURDAY, May 20th - FREE ACTIVITIES 10 AM – 1 PM Happy 15th Birthday to the WaterShed! Join us today to celebrate this milestone with games and activities, cake and ice cream, live music, a petting zoo and more! Explore our beautiful River Campus, wade in our simulated Boise River, visit with some of the Public Art artists, and sign our giant birthday card. It's a celebration for everyone!