For reservations call: 866-690-4006

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Family Fun at Our IA Hotel Waterpark


Make a splash at Grand Harbor Resort’s onsite indoor waterpark! We offer 25,000 square feet of wet fun for the entire family – including 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!

Waterpark gift cards

Stop in or call 866-690-4006 today to purcahse 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.

Arcade Hours are:

Thursday - 4pm to 9pm

Friday - 8am to 10:30pm

Saturday - 8am to 10:30pm

Sunday - 8am to 9pm

Closed - Monday, Tuesday and Wednesday

Birthdays and Groups

Birthdays at Grand Harbor Resort and Waterpark

Kids of all ages will love celebrating their birthday here! The Grand Harbor Resort & Waterpark offers two great birthday party packages, Ultimate Soaker and Crazy Cannonball. Both include:

  • Waterpark admission for 12 swimmers
  • One hour in private party room
  • Three large one-topping pizzas
  • Three two-liter bottles of soda
  • Quarter sheet cake
  • Arcade tokens
  • Personal server

Ultimate Soaker, Saturday's package, includes 100 arcade tokens and is $250.00, not including tax and service.
Crazy Cannonball, Sunday through Friday’s package, includes 80 arcade tokens and is $200.00, not including tax and service.
Non-swimmer guests are $5.00 plus tax. We appreciate a two-week in advance reservation to guarantee your party.
Call Alicia at (563) 690-3240 to book!

Upcoming Events

There’s always something exciting happening at the Grand Harbor Resort & Waterpark in Dubuque, Iowa. Browse our list of upcoming events below, and check back often for more events!

Beginning June 13th from 11am to 7pm 

Solar System Scavenger Hunt
Who can put all the pieces to the solar
system back together? Search our
property for the intergalactic clues.

Moon Sand
Take home a part of the Grand Harbor Galaxy.
This sand is nothing like what you will find in
your sandbox. Come create this unique
Cosmic Moon Sand!

Squishy Planet Art
Let’s take this art project to the next level!
Try this fun filled painting project using the
plastic wrap to put a new spin on your Planet.

Footprint Rockets
Whose shoe can go to the moon? Design
your rocket using your very own shoe print.

Noodle Galaxy
The skies the limit! Using colored
noodles create your very own galaxy.

Neon Bubbles
Pink! Blue! Green! What color will you
choose? Create your own colored bubbles.

Orbit Snack Mix
Hungry?! Why wait . . . Stop by our waterquirts room
to put together some snack mix to enjoy now or later.

Paper Rockets
3! 2! 1! Launch! Whose balloon can
fly to the Moon? Create your own
rocket and watch it take flight.

Other Area Attractions

Grand Harbor Resort & Waterpark’s central location, in the Port of Dubuque, IA, places you a short distance away from many of the area’s top activities and attractions. We’ve listed some of the highlights below; if you would like additional information about these or other things to do here in Dubuque, please ask us!