The Reef Indoor Water Park is Montana’s largest indoor water slide facility. Race down one of our three-story slides or ride an inner-tube in our wave pool. Enjoy refreshments at the concession stand or play games in the arcade. Don’t worry Mom and Dad – while the kids are splashing, you can be relaxing in our 25-person hot tub. The Reef Indoor Water Park is not only fun, but safe too. Certified lifeguards are always on hand to ensure the safety of our guests. Water Park passes can be purchased at the Big Horn Resort front desk.

  • Locker rooms
  • Interactive play house with water dumping bucket
  • Blaster slide 386'
  • Tropical Twister slide 340'
  • Wave pool
  • 25-person hot tub
  • Basketball pool
  • Lilly pads
  • First aid station
  • Ripp’s Café
  • Birthday party rooms
  • Arcade
  • Sundry shop
  • Patio space available for outdoor parties


Big Horn Resort, an Ascend Hotel Collection Member




Reef water Park promotion
Reef water Park promotion
Billings after


Check-In: 3:00 pm

Check-Out: 11:00 am

Please note: A major credit
card or debit card is required
at check-in.