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Join us for the Second Annual Crystal Lake Aquathon


We are happy to bring back the Crystal Lake Aquathon.  This annual event will be returning to the ideal confines of Three Oaks Recreational Center in Crystal Lake, IL.  As the only aquathon in the state of Illinois, this race will offer 3 timed options: 

- Sprint Distance (500m swim, 5k run)
- Olympic Distance (1 mile swim, 10k run)
- 2 Mile Swim 

The swim portion takes place in a modified quarry (swim around 3 islands!) while the run is on a combination of trail, sand, and pavement (and even a bridge!).

Come for the race, stay for the fun at the awards ceremony/after-party hosted by The Quarry Cable Park.  Awards will be given to 1st, 2nd, and 3rd place finishers in each age group for female and male.  All participants will be given a free raffle ticket to win great items.  Last place finishers receive a special prize too!  There will be much to celebrate at this event.  Stay after to enjoy all that Three Oaks has to offer: swimming, sailboat and paddle board rentals, scuba diving, children's playground/splash park, volleyball, fishing, and fun in the sun!  All proceeds from the race benefit Girls on the Run of Northwest Illinois.  

Registration fees

Guest Meal Ticket at After Party (Meal is free for Participants and Volunteers) Closed

Meal is free to participants and volunteers however if your family/guests are interested in eating (meal options include coffee, juice, pinwheels, fruit, bagels, bacon, etc)

Sprint Distance Aquathon Closed

    1. Registration closed

Olympic Distance Aquathon Closed

    1. Registration closed

2 Mile Swim Closed


    1. Registration closed

Relay - Sprint Distance Aquathon Closed

Must sign up both relay members at time of registration.

    1. Registration closed

Relay - Olympic Distance Aquathon Closed

    1. Registration closed

Race Routes

See the swim course . . . .

(2 mile course will swim the purple route 2 times)


And the run course . . . .

(the 10k course will run the purple route 2 times)


Benefiting Girls on the Run

We are proud to partner with Girls on the Run.  This amazing organization empowers girls by integrating running and an experienced-based curriculum to be joyful, healthy, and confident.  For more information, please visit:

Thank you to our 2018 Sponsors











Event Schedule

  • August 12 7:30 AM CDT - Olympic Distance Aquathon Start

  • August 12 7:45 AM CDT - Sprint Distance Aquathon Start

  • August 12 8:00 AM CDT - Iron Distance Swim Only Start

  • August 12 9:45 AM CDT - Award Ceremony

Contact Information

Event Location

Crystal Lake, 5517 Northwest Hwy, Crystal Lake, IL 60014, USA

Click here to view map