Community Update: Our response to COVID-19

Waterpark Admission

Tickets purchased online must be used on selected date. Admission tickets can also be purchased at the gate. 


  • Height and weight restriction apply for some rides

  • No rivets on swimwear for some rides

  • Sorry no refunds for rain

  • Please note the attendance tracker at the top of the page, prior to your visit.

2020 Reserved Entry - Online Only

Guarantee your entry for a specific day. Admission ticket still required. 

Adult & Children: $5.00 

Must be purchased by midnight the night before the day of your visit. 


2020 Date Specific Admission - Online Only

Purchase tickets in advance for a specific day and guarantee your entry. 

Adult & Children: $37.00

Must be purchased by midnight the night before the day of your visit. 


2020 Day Pass - At the Gate

Got little ones with you? Purchase tickets at the gate and save money on their admission ticket! 

Children Under 48": $27.00

Children Ages 3 & Under: FREE

48" and Over: $32.00

Discounts Available at the Gate: Valid ID Required

Senior/Military/AAA: $30.00

2020 Waterpark Two-Day Pass - At the Gate

Come back and save! Passes must be used in two consecutive days. The second day will guarantee you into the capacity count. 

Adult & Children: $48.00

2020 Bundle Pass - At the Gate

Get an all access pass to everything Lost Island has to offer. Bundle Pass includes one waterpark admission, one round of miniature golf, and one go-kart race. 

Adult & Children: $38.75

2020 Individual Standard Season Pass

Standard Season Pass is valid for admission for the entire 2020 season!

Adult & Children: $150 - Plus tax


2020 Individual Gold Season Pass

Gold Season Pass membership is valid for admission PLUS extra benefits and discounts for the entire 2020 season!

Adult & Children: $199 - Plus tax

Gold Season Pass membership includes:

  • Souvenir Refillable Mug for FREE refills all season long!
  • NEW AMENITY - Unlimited miniature golf all season. 
  • $10 discount on cabana rental.
  • $12 discount once per visit on admission for a friend.
  • 10% discount on food at Castaway and Treetop Cafe.
  • Locker Pass for 1 FREE small locker rental per visit.


2020 Locker Pass

Entitles pass holder to 1 small locker rental per visit all season long!


** Online Purchases:

The form you will print when purchasing online IS YOUR TICKET. Treat it with care. Bring the ticket to the park entrance to be scanned for authenticity. Do not make copies of the ticket. The first ticket scanned will be admitted; duplicates will be rejected. Tickets can be transferred by email. Lost or stolen tickets can be replaced. All tickets must be used in the current Lost Island season. Click here for schedule.

Please contact our Online Purchasing Customer Service with questions regarding the online purchase process. Call: 319-233-8414, durning normal buisness hours or email:

We accept these major credit cards:

Return Policy:
Once the ticket has been purchased. Your ticket is non-refundable.

Prices are per visitor.


Due to weather, daily schedules are subject to change at the discretion of management. For the safety of our staff and guests, the park will close if the temperature drops below acceptable standards. If weather conditions are questionable please call ahead, 319-233-8414, to confirm park is open.