Every Full moon turns into a late night swim part at Barton Springs. It’s been a long running ATX tradition that has gown a little out of control over the past few years. A once free and open event, the Park has had to make a few changes starting July 19th, 2016. The Full Moon swim in now limited to 750 patron after 8:30 and will also be required to pay the standard $3.00 entry fee. Last Event there were over 2,500 people and things were so packed, it became dangerous. It should still me fun if you can get it. Probably need to show up a little earlier this time around if you really want to attend this event.