Mahoney Aquatic Center (in Eugene T. Mahoney State Park) is still open and will be open through September 1!
Cost: $10 adult/$8 child
Hours: 12:00 noon-5:00 PM and 6:00-8:00 PM on Saturday and 12:00 noon-5:00 PM on Sunday
What does Mahoney Water Park have? They have multiple slides, a diving well, a pool, a splash pad, a toddler/preschool swimming area and a wave pool (my personal favorite). AND they just opened more slides.
We spent the entire afternoon there last week and it was delightful.