For reservations call: 866-690-4006

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Grand Harbor

Notice of Park Hours

Make Sure The Park Is Open During Your Stay!


Grand Harbor Waterpark is open daily during spring break, summer & select holiday periods.


The Park is closed Mondays, Tuesdays & Wednesdays during select seasons.


Please view the Grand Harbor Waterpark Park Hours for complete details.


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.e (*except Grand Harbor Holidays where price is subject to change).
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

New Year’s Eve Spooktacular!

Caramel Apples from 4-7pm $2 each (located in old WS room)

Pumpkin Punch-out  from 4-7pm (old WS room) $1 chances. You could win anything from arcade tokens to candy!  You could even win a Grand Harbor gift card or a free overnight stay for a future visit!

Boo Bash 5pm 10pm (Bucket dump at 10pm) close at 11pm

5:30 pm – Costume Parade

                Join us in the lobby for the Grand Harbor’s Ultimate Favorite Halloween tradition!  Parade will start promptly at 5:30, please arrive in the lobby at 5:15 to listen to parade route and any other info.

6:30pm – Witches Sweep

                Use a witches broom to sweep your teams pumpkin across the waterpark floor.  The team that gets all their players across the finish line wins!

7:00 pm – Worm Pie Eating

                Who doesn’t love a pie eating contest?!  Contestants will dig in face first (hands behind their back) into their chocolate pudding pie…filled with gummy worms!  The first person to eat their entire pie and worms wins!

8:00 pm -Candy Corn Dump

                Players will take turns strapping a cup to the top of their foot, filling it with candy corn, and transferring the candy from one container to another.  The catch? When they dump the candy they can only use their legs and feet, NO HANDS!  The team that has the most candy in their container when time runs out is the winner!

8:30 pm –The Human Jack-O-Lantern

                Players will be divided into teams and one person from each team will cover their face with whip cream.  All other players will throw cheeseballs on their teammates face and try to get as many cheeseballs to stick to their face!  The team that gets the most cheeseballs to stick will win!

9:00 pm – Pinata

            New Year’s Eve at Grand Harbor wouldn’t be complete without our giant piñata! Last year, we decided to make 2 since they were getting too heavy for just one! First will be ages 10 and under.  Then immediately following will be the 11 and older category.  Don’t miss out on all the candy and prizes!


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!