Inter-Rockin Event

Date / Location

Sunday, July 9, 2017

DAY BEFORE REGISTRATION OPEN - 2:00 - 5:00 p.m. at the park

DAY OF REGISTRATION OPEN - 6:00 - 7:30 a.m.

Interlochen State Park
4167 M-137
Interlochen, MI 49643


This is a state park so all vehicles must have a Recreational Passport to enter the park. Michigan residents can purchase a passport at the Secretary of State when renewing vehicle tags or at the park office. The pass is good for an entire a year.  

All non-residents can purchase a one day pass for $8.40 or an annual pass for $33.40 at the park office. There is very limited parking, so please plan to arrive early.


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

usat-triathlon-logo Event

The Scene

Entering its 14th year and the 12th at Interlochen State Park, InterROCKIN is located across the street from the world renowned Interlochen Music Camp. Just 15 minutes from Downtown Traverse City, and 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 just a perfect vacation destination event with something for the entire family.

  • Custom event shirt
  • Custom finishers medal
  • Custom latex swim cap
  • Sponsor supplied samples
  • Professional chip timing with results available online
  • Awards to top three in each age group
  • Great sponsor supplied raffle and awards ceremony following the last finisher  
  • The best post race snack table out there. 

3DPurple_logo-2 Event

For an extra $25 select the PURPLE option at the registration process.  You will have until 2 weeks before the event to add this to your registration as well.  To plan for each Purple event this will close 2 weeks prior to each purple event.  Exclusive PURPLE Tent for those registered will be set privately adjacent to the post race area.  


In addition to the tent you will enjoy these PURPLE Amenities: 

  • Morning coffee
  • Fast trac packet pickup
  • Preferred racking
  • Exclusive 3D recovery tent: recovery boots, masseuse, lounge chairs, fan, ice pool, towels, rollers, food & beverage
  • Purple results and more…..

Age Up Rule
Your age on race day is the same as how old you will be on December 31 of that year.

Top 3 Men and Top 3 Women Overall in each event and excluded from their age group.

Age Groups
Top 3 Men and Top 3 Women within each of the following age groups:
19 and under, 20-24, 25-29, 30-34, 35-39,40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70-74, 75-79, 80+
*In the event there may not be at least 4 athletes within an age group, an age group may be combined, for example 2 in 20-24 and 2 and 25-29 = 20-29 age group combined.

*Sprint Triathlon - Typically offers 15 and under and 16-19 in addition
*Masters - First place 40+ masters in Olympic and Sprint Distance Triathlons
*Top 3 Clydesdales in Olympic and Sprint Distance Triathlons (Clydesdale = Male 225lbs or more)
*Top 3 Athenas in Olympic and Sprint Distance Triathlons (Athena = Females 165lbs or more)

Aquabike - First place Olympic Aquabike and first place Sprint Aquabike
Kaya-Tri - Top 3 Men and Top 3 Women Overall (when applicable)
Super Sprint - All athletes will receive a finisher medal when crossing the finish line. This category is designed for those wanting to Try the Tri or to enjoy a fun, family-friendly race. In that spirit, no awards are presented. Everyone is a winner!
Awards will in NO circumstances be given out early, or individually before the awards ceremony. If you must depart before the awards ceremony, you may opt to pay a shipping and processing fee and have the award mailed to you. Please click on the link below to be taken to the Transition Bag Store where you can select the AWARD Item.



Interlochen State Park
Michigan DNR

Pepsi Co
Gatorade Endurance
Rudy Project
Tri Again Fitness

Support Crew

Athletes Responsibility

Due to an increasing amount of athletes entering events they may not be properly trained for, we are asking each athlete to be responsible and honest with his/her ability to complete the distance registering for. Due to safety concerns for everyone involved including you the athlete, but also the support crew volunteers and officials like police, sheriff, fire department, etc. we must instill course cut off times at 4 hrs. Raffle and awards start at 3 hrs and 30 minutes in Olympic distance events and 99% of all athletes are finished by that time. So you must register for the event you will finish under that 4 hour time limit. Being a responsible athlete means if you cannot complete the Olympic distance comfortably under that time we recommend you participate in the sprint event. We encourage you to train for the goal to reach that Olympic distance under the 4 hour time limit. If you do not have a clear idea as to how to achieve that goal we are here to help, please let us know.

An athlete will be informed he/she has reached the 4 hr. cut off, at which time the athlete will acknowledge he/she understands completely and he/she will be brought in off the course by the course coordinator. If the athlete refuses this he/she will be informed that there will not be any support left on the course from that point and he/she must acknowledge this and understand he/she is continuing under those circumstances at which time the athlete will remove the timing chip/strap and give to the course coordinator.  

Again an athlete must take the responsibility on as an athlete understanding his/her ability at the time of the event. Knowing that support crew volunteers, as well as other personnel out on courses must be kept in safe conditions as well.

Event images