Splash into non-stop excitement and adventure with our 56,000-square-feet indoor water park kept at a warm 84 degrees year-round, dry land attractions, free daily activities, signature suites, delicious dining options and much more! It's an easy and hassle-free experience so your pack can enjoy a world of fun—all under one roof. Book now for a family getaway in Grand Mound, between Portland and Seattle, WA.