Over 625 athletes from Illinois, Minnesota, Missouri, and Wisconsin will ascend upon The Falls Aquatic Center when the Black Hawk Area Swim Team (BLAST) & the Mason City Swim Club hold the largest swim meet ever held in the state of Iowa July 10th - 13th. On July 10th the Rock Falls lap pool will close at 4 p.m., but the Adventure and Safari Falls will remain open normal hours. On July 11th and 12th the Rock Falls lap pool will remain closed for the swim meet, and Adventure and Safari Falls will remain open to 1,000 attendees at one time. Normal admission rates will apply. July 13 The Falls will resume it's regular schedule.