On select dates throughout the year, Zilker Botanical Garden offers free days where no admission is charged. Free Days for 2024: January 15, February 19, March 12, April 28, July 14, September 7, November 11, December 26 No advance registration is necessary. Final entry to the Garden is 4:30pm. Parking is always free and available via our main parking lot, which can be accessed through the front entrance of the garden. If overflow parking is needed, our overflow lot at 2300 Stratford Drive will be open. If you park in the overflow lot, you can enter directly across the street through the Hartman Gate at the back entrance. This is a highly ornamental gate and is easily recognizable.