LEGOLAND California Water Park in Carlsbad spreads across 10 acres adjacent to the main theme park on Legoland Drive, offering 17 water rides and attractions anchored by the Build-A-Raft River, Pirate Reef flume, and the six-lane Riptide Racers slide complex added with the Surfer's Cove expansion. The Water Park debuted in May 2010 as the world's first LEGO-themed water park and drew its original 5.5-acre footprint from the park's north end — a seasonal complement to the year-round LEGO experiences that overnight guests at LEGOLAND Castle Hotel access with multi-day hopper passes. Orange Rush sends raft riders down a giant half-pipe that banks past the Water Park tower, while Splash Out and Twin Chasers offer mat-racing and tube-racing formats for older children meeting the 42-inch height threshold. DUPLO Splash Safari and a dedicated toddler spray pad serve guests under six, rounding out a height-tiered ride system spanning the full 2-through-12 age range — a progression from water play to the unprotected surf conditions along Carlsbad City Beach. The Build-A-Raft River circulates riders through a channeled lazy-river loop where oversized soft LEGO bricks snap onto inner tubes, integrating construction play into a continuous-flow water conveyance system.