InterROCKIN Triathlon

Interlochen State Park
4167 M- 137,
Interlochen, MI 49643

Entering its 12th year and the 10th at Interlochen State Park, InterROCKIN is located just fifteen minutes from downtown Traverse City with a great campground right there in the state park. This event has a huge following of athletes who bring the entire family up to camp at the park for the event. And you can spend the whole week in Traverse City, as this event is scheduled conveniently at the end of the Traverse City International Cherry Festival.

The out and back run course cuts right through the campground so dozens of campers can cheer you on at the start and end of your run discipline. The swim is in crystal clear Duck Lake. The bike course is the flattest part of the entire Grand Traverse County; the only climb at about mile 4 on the course. Lightly traveled smooth roads make this a perfect vacation destination event with something for the entire family.

Choose Your Race:

Olympic Triathlon - 1500m swim, 40k bike, 10k run  Sprint Triathlon - 500m swim, 20k bike, 5k run  Duathlon - 5k run, 20k bike, 5k run Kaya-Tri - 2mi kayak/SUP, 20k bike, 5k run Olympic Aquabike- 1500m swim, 40k bike  Sprint Aquabike - 500m swim, 20k bike Super Sprint - 200m swim, 10k bike, 1mi run ** Relays offered for both the Olympic and Sprint Distance Triathlon


Individual Olympic, Sprint and Duathlon $80 thru April 16th $90 April 17th and after until online registration closes midnight Thursday before the event.

Super Sprint $38 until online registration closes midnight Thursday before the event.

Relays $99 thru April 16th $119 April 17th until online registration closes midnight Thursday before the event.

Onsite Registration - CASH ONLY Day before: add $10 to above pricing (2-5 p.m.)  Day of: add $20 to above pricing (6-7:30 a.m.) Relays: add $20 to above pricing 

Non-USAT Members $15 One Day Fee (collected onsite cash or check ONLY).

For more information contact [email protected] or call 231-546-2229. Information and registration is also available online at

Please Note: The Michigan Department of Natural Resources makes every effort to provide the most up-to-date and accurate information on the web calendar. However, dates occasionally change and events may be canceled for any reason. Please call the unit hosting the event to confirm dates and times prior to your arrival.

A Recreation Passport is required for entry into all Michigan state parks and recreation areas. Check "YES" when you renew your license plate at the Secretary of State.

For camping reservations, visit or call 1-800-447-2757.

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DNR, Interlochen State Park 3 Disciplines InterRockin Triathlon
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