Cascades Indoor Water Park at Greek Peak Mountain Resort is 41,000 square feet of fun. The temperature is a perfect 84 degrees all year long. The waterpark features more than 150,000 gallons of water, more than 500 feet of water slides, an activity pool, a wading pool, hot tubs, and much more. It is located inside of Hope Lake Lodge, a luxurious “Green” Hotel with panoramic views in every direction. An arcade, a cafe, and lockers are available.