trying to make a reservation on OpenTable for June 30th but it doesn't show anything past 4:00 pm
It looks like IOA is open 9-10 everyday and the Studios is open 9-9 everyday. The park hours are subject to change.Sorry don't know about the summer. I checked for mid-April (spring break) and they had reservations up until 10pm. The park is open until 10pm that week.