Dubuque, Iowa Water Park

The greatest onsite Iowa Water Park around

Make a splash at Grand Harbor Resort’s onsite indoor waterpark! We offer 25,000 square feet of wet fun for the entire family. This refreshing experience includes waterslides, tube rides, rope ladders, waterspouts, water chutes, squirt guns and powerful water cannons as well as a lazy river, activity pools, and two giant hot tub whirlpools. Grab a snack at the River’s Edge Café or experience the “four story splash” – 350 gallons of water dumped every eight minutes from our four-story Huck Finn II Treehouse!


Please view our Waterpark Rate Calendar September 2017. 

Please view our Waterpark Rate Calendar October 2017

View the Waterpark Concessions Menu.
View our 2017 Operating Calendar.

Waterpark Gift Cards

Stop in or call 866-690-4006 today to purchase your hotel gift card!

Cave Arcade

Be sure to visit the “Cave,” our huge interactive game room, with all of your favorite video and arcade games, including the Wheel of Fortune, Whack-a-Mole and Ski Ball. Collect tickets to redeem for prizes at our prize redemption center.

Seasonal Hours for the Arcade are:

Thursday – 4:00 p.m. to 9:00 p.m.
Friday – 8:00 a.m. to 10:00 p.m.
Saturday – 8:00 a.m. to 10:00 p.m.
Sunday – 8:00 a.m. to 9:00 p.m.
Closed - Monday, Tuesday and Wednesday

Please call 1-866-690-4006 for daily hours

Birthdays and Groups

Birthday Party Packages

Call Tony Roma's at 563-690-3249 to book your party

$250 (Based on 12 people)

  • Choice of (24) chicken tenders/FF (7.5lbs.), two two-topping pizzas/FF ($2.00/each additional topping) or (2.5qt) macaroni-n-cheese/FF                                                         
  • Two pitchers of soda (Coke, Diet Coke, Sprite, Root Beer, Orange Fanta, Cherry Coke and Lemonade)
  • (12) cookie sundaes

$125 (Based on six people)

  • Choice of (12) chicken tenders/FF (3.25lbs.) or one two-topping pizza/FF or (1.25qt) macaroni-n-cheese /FF
  • Six sodas
  • Six cookie sundaes

Add Ons

  • $19.99 (12) Chicken tenders
  • $10.00/Quart of macaroni-n-cheese
  • $1.00/Soda
  • $7.00/Pitcher of soda              
  • $1.00/Cookie sundae
  • $30.00/Birthday cake
  • $50.00/Banquet room

Pizza Add Ons

  • One topping - $14.00                                          
  • Two toppings - $16.00
  • Three toppings - $18.00
  • Specialty (Meat Lovers, Supreme, Veggie, Hawaiian, BBQ Chicken) - $24