Barton Springs Pool resumes reservations, capacity limit for summer This summer’s capacity limit will have a max of around 600 people every two-hour time slot. AUSTIN, Texas - Starting May 21st, reservations will be required to visit Barton Springs Pool. The goal is to keep both the staff and guests safe and keep the capacity at a maintainable level since the pandemic took a toll on the pool’s staffing. On May 10th, the first set of reservation slots will be available for the public to sign up for and secure a two-hour time slot. Season pass holders do not need a reservation.