This indoor aquatic playground stands as a monument to the radical concept that Oregonians shouldn’t have to wait for those three glorious weeks of summer to enjoy water-based fun.

Tucked away in the unassuming city of Milwaukie sits a chlorine-scented paradise that might just be Oregon’s best-kept aquatic secret – the North Clackamas Aquatic Park.

Urban Air Adventure Park will add a third Minnesota outpost in Apple Valley later this month, adding to a roster that already ...