All you need to do to visit the Zoo for free on Wednesday, April 17 is proof of San Francisco residency. This can be in the form of a valid driver’s license identification card with an SF address.
Have you been hanging on to that Wisconsin drivers license for some reason? Then a utility bill with your name and a San Francisco address, along with a valid photo I.D., will do the trick.
The Zoo opens at 10 AM every day, and closes at 5 PM (last admission is at 4:30). You can take the L Taraval to get there, or if you drive, the Zoo’s lot charges you $8. However, parking is free and relatively copious on Sloat, if you’re cool with walking a bit.