North Clackamas Aquatic Park's 400,000 gallons of H2O stream down two twisty tube slides and splash swimmers in three swimming pools housed within this waterlogged indoor playground. During Big Surf! recreational hours, divers plunge into 13-foot-deep water as swimmers on rental tubes crest the wave pool's 4-foot surf, whereas competitive swimmers hone skills in the 25-yard, six-lane lap pool. A drop slide sends adventurous aquanauts plunging, as climbers head the other direction on a 29-foot rock wall with three routes for scalers of all skill levels. As adults unwind in the hot tub, pint-size splashers flit about interactive fountains, coast down the Sammie the Seal slide into a kiddie pool, or organize their fellow tots into a filibuster until chaperones acquiesce to snack demands at the Surf's Up Cafe. Swimming lessons, complimentary life jackets, and inflatable submarines are also available to help guests swim safely.