Find your water wonderland in Washington! Make a splash in more than 56,000 square feet of waterpark adventures at Great Wolf Lodge - Grand Mound. Explore Fort Mackenzie, a four-story interactive treehouse, shoot down the Howlin' Tornado six-story funnel ride, or enjoy fast-paced fun on raft slides. Take a dip in the sparkling swimming pools, traverse the lily pad water obstacle course Big Foot Pass, and zip down water slides. Get splashed at the wave pool Slap Tail Pond while adults relax in the South Hot Springs jumbo warming pool oasis. Find even more aquatic adventures at the Asotin County Family Aquatic Center. This pirate-themed aquatic center features an outdoor waterpark with slippery slides, a lazy river, and an adventure pool. Finally, dive into watery family fun at Slidewaters at Lake Chelan!