Why this race venue? CLOSED COURSE!!! No vehicles to worry about on the bike course. The other obvious question is the water temp this time of year. The last 3 years we held it this time of year the water temp was 70, actually much warmer than the air in the morning. It is a very shallow lake so it stays warm into October.

Holly Recreation Area provides a plethora of both rustic and modern camping sites as well as hiking, fishing, and other family activities.

The course we have developed over 15 years now features a time trial swim start, straight out, and back rectangle course. An entirely closed challenging road bike course, rolling to hilly the entire route. It is 3 miles to the back of the park, so you will complete 1, 2, or 4 loops.

The new run course is much easier than the old one, keeping you on gravel and blacktopped roads flat with the exception of the run up out of the venue.

Another great venue to bring the family for a nice picnic following the event.

Race Morning Registration opens 7:30 a.m. – 8:30 a.m.


May 11, 2024  9;00 a.m.

Holly Recreation Area
8100 Grange Hall Rd.
Holly, MI 48442

Day of Registration open 7:30 a.m. – 8:30 a.m. ONLY!

  • Long Triathlon – 1000m swim, 24 mi. bike, 6 mi. run
  • Long Aquabike – 1000m swim, 24 mi. bike
  • Sprint Triathlon – 500m swim, 12 mi. bike, 3 mi. run
  • Sprint Aquabike – 500m swim, 12 mi. bike
  • Super Sprint – 200m swim, 6 mi. bike, 1.5 mi. run
  • Sprint Duathlon – 2.5k run, 12 mi. bike, 3 mi. run

**2 and 3 person relay offered for the Olympic and Sprint Distance Triathlon

Entry Fees: Ind. Relays* SuperSprint:
Until 2.28 $110 $150 $65
3.1 – 4.30 $125 $150 $65
5.1 to 5-7 $135 $150 $65
5.8 to online closes $135 $150 $65

*Relays: Sprint & Olympic $150

TRI – 1: $30


Closes the Thursday before the event at 6 p.m.

DAY OF REGISTRATION: Opens 7:30 a.m.

Refund Policy: NO REFUNDS for any reason unless you have been double charged or accidentally signed up more than once, military transfer or death in the family.

Standard event industry policy: states that when emergency conditions such as weather, threats of terrorism, medical emergencies, or any potentially unsafe condition out of our control force the cancellation of an event, refunds cannot and will not be provided since funds have been spent on race day already.

Athlete Amenities: Guaranteed to those pre-registered 14 days out

  • Custom event shirt for those that opt for shirt
  • Custom finishers medal
  • Professional chip timing with results available online
  • No awards for this event

This is a state park, 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 $33.40 at the park office. There is very limited parking that is a reason for the cap, so please plan to arrive early.


NO Day Before Registration or pickup

  • *7:30: Transition Athlete Check-in,
  • *8:45 am – Transition area Closed,
  • *9:00 am – Olympic distance athletes,
  • *9:15 am – Duathletes, All runners start
  • *9:20 am – Sprint Athletes start
  • *9:35 am – Super Sprint athletes start

Holly Recreation Area DNR
Groveland Fire/EMS

Pepsi Co

Support Crews
Lapeer High School Swim Team

Our exclusive TRI – One program was launched many years ago when athletes raced as part of their training, rewarded themselves for all the training they were doing and to gain all that important race day experience you cannot simulate. As the multi-sport community has evolved to the opposite now we are bringing back the program. It is really simple, you need more open water swim training? Great, cmon out and get it with our lifeguards and courses. Want to get a nice hard time trial on the bike in? Cmon out and race on our course. Need to get a run in and want to do so with aid stations? Cmon out and join other runners.

Each TRI – One will have a designated start time, you will simply head to the TRI – One start flag for the discipline you choose, line up, and when the clock strikes and the horn sounds you are off. With our events, time trial swim starts now you will line up accordingly. Or if you want to take the Kayak or SUP out for a nice paddle with others where offered.

The cost for these is a flat $30. For that, you get a finisher’s medal and access to the post-race food tent. You may purchase a shirt for $10.

Register onsite it is cash only!

Tri-1-Logo-Final-01 General Information


Again one of Kenny’s favorite courses start to finish!

Herron Lake is a motor free lake, one of the few left out there. It is very clean and clear. Sprint distance you will have a rectangle course straight out, across 30m and back in. Olympic distance will have a 2 loop diamond shaped course.

Water temp has been in the upper 60's to low 70s every year.

The bike is 100% closed to traffic, but it is fun and challenging – rolling to hilly at times. The perfect course for those looking for an exhilarating challenge. Communication is needed as it is a 3mi course, down and back equaling 6 miles. 1, 2, or 4 loops will complete the bike discipline and it is your responsibility to count laps. A fast downhill turn at the Transition Area end will require braking and handling and focus.

The run course trail has been eliminated so it is all dirt road and paved run, rolling with a fast descent back down to the beach. You will have about a 500m climb out from the lake up to the road. 1 or 2 loops.

Opens – 7:30 am

No friends or family members allowed in the transition area for any reason. The race director and race officials will close the transition area 15-20 minutes before race start to ensure all athletes are at the starting area for mandatory course meeting and announcements. Once the transition area is closed, you will NOT be permitted back in before the race starts. Family/Friends will not be permitted in for any reason at any time throughout the event.


When the last cyclist is off the course and has headed out for the run. This time is variable and we will make announcements at the event when the transition area is ready to re-open.

Any athletes removing gear from transition areas before the announcer or race director has officially opened the transition area will be DISQUALIFIED from the race! This pertains to all athletes of all distances. All athletes deserve a clear transition.

In the event of inclement weather, it is recommended you have warm, dry clothing outside the transition area to put on following your finish due to other athletes still being on the bike course.

Timing Chip

When you have completed the race, please do NOT enter the transition area wearing your timing chip. PLEASE remove your chip before re-entering the transition area and exiting again. This will cause a timing error.


You must rack according to your race number, based on the sequence numbers placed at the end of each row. Please remember racks will hold 7 bikes racked with the seat tip on support bar. Please be courteous to fellow athletes to ensure there is space for 7 bikes on a rack. If there is not enough room for your bike on your designated rack, please see a 3D Team member and we will help. Please do not move another athletes bike or gear.

Aid Station

Located at the run in/out chute with water and electrolyte replacement.


Run In/Out and Bike In/Out chutes are clearly marked on the large structures at either end. It is your responsibility to go the right direction while racing in the transition area.

All events will be a Time Trial swim start. For safety reasons, it is important we ensure we are doing all we can to alleviate stress at the start and turning at buoys. A time trial start ensures everyone has a clear, stress-free swim. You will SELF-SEED according to your swimming ability, this is important to ensure you are not swam over or create congestion by seeding yourself faster than you can swim. Don’t be that athlete that creates a traffic jam. Seed yourself appropriately and everyone will have a great time in the water.

Each athlete will report their number to the timer before crossing the timing mats and entering the water. Again your responsibility to report that number to the timer.

Time trial starts: Long course athletes first, followed about 30 minutes later with Sprint, then 20 minutes later Super Sprint athletes.

Starting on the beach: Long course athletes will follow a U-shaped course exiting after the first loop and back in for loop 2. For sprint athletes, we will make a U-shaped course for you straight out, across 30m, and back in.

Wetsuits are available for rent. Please rent by TUESDAY before the event. If you are interested in renting a wetsuit we have shortie, sleeveless, and full wetsuits. Please email with your name, size, and type of wetsuit. It is $50 cash paid onsite. You will be responsible for ANY and ALL damage to the wetsuit, a credit card will be put on file for these damages. You will pick up your wetsuit at the wetsuit check-in transition check-in race morning. You will drop your wetsuit off at the post-race food tent with a 3Disciplines TEAM member ONLY, NOT a volunteer. He/She will inspect the wetsuit and check you out by returning your credit card. Again please email by Tuesday before the event to reserve your size and style.

Lifeguards will be on the water for your safety.

Click here for swim course map:

A great CLOSED rolling hills bike course!

You will exit the Transition Area in the parking lot directly up the hill and follow the park road to the dead-end in the back of the park. This is a 6mi course, 2 laps for sprint athletes and 4 loops for long course athletes. At the backside, you will loop through a parking lot so you can keep your speed and focus. The front side turnaround is a fast short downhill after a short climb, this is what has become the “hot” corner, a couple of hundred spectators gather at this spot, you must slow when heading downhill to the turn.

The entire course will be closed to all traffic. We will have cones down the middle ensuring you do not cross the middle line as this is a rolling, sweeping, fast and exhilarating course. After completing your 2nd or 4th lap, you will head down the hill back to the Transition Area. This bike course will test both your fitness level as well as your gear changing ability.

Bike course map:

Exiting the Transition Area out the back end opposite of bike, you will follow the run chute back up the driveway that you entered and exited on the bike, up through the crowds watching the bike discipline to a LEFT out of the park and a RIGHT on McGinnis road to the turnaround about a mile down and head back to the park. Making a RIGHT heading into the camping side of Holly Recreation area for the turnaround past the pay station at the end of the bridge turning around and heading back across McGinnis road and back into the beach side. As you make your RIGHT past the pay station there will be a coned lane for you up, that will take you down to the boat launch where there is a trail just before the launch on the left side, this pops out at the beach. You will take the beach walk down to either the finish or international long-distance athletes will make a LEFT up through the park building and back up for lap 2. This is a 2 loop course for long-distance athletes. Again, the new course does not use the trails. Athletes over the years said it was to difficult of a run following the bike. So the new run course is basically flat after heading out of the beach area.

Course map here:

You will start with your specific swim wave. Check the information cube at the event for wave start information.

You will complete the Swim and Bike disciplines of the event. Following your Bike discipline, you will dismount your bike, cross the Bike In timing mats and place your bike back at your spot on the rack in the Transition Area. You will then proceed across the Run Out timing mats and you are done! Your finish time will be when you cross the timing mats at that point.

DO NOT re-enter the transition area through Run In/Out or Bike In/Out. This will cause a timing error.

Finisher Memento

If the event offers a finisher’s memento, please proceed to the finish area to receive the item. Tell the support crew at the finish line you were in the aquabike race and they will hand you the finishers memento.

Run – Bike – Run: here we go for the folks who would rather not swim:

Starting out under the duathlon start flag you will head out up the hill to the 2.5k turnaround point, head back down the hill and into the transition area for the bike discipline. Then following your two loops on the bike you will transition back to the final run. Then following the sprint 5k course to finish it all off.

One of the first to launch the Super Sprint back in 2014, the goal with it was to provide an intro to Triathlon. No matter your age, 6 yrs to 80+ yrs. the final wave of the day to start gets you out of the chaos of the start, and keeps you with like-minded athletes. A perfect introductory distance that we try to keep non-competitive with no awards, but of course, everyone gets a finisher medal. Come on out and Try your first TRI. Questions, don’t hesitate, any question is a good question!

200m swim – your swim will always start following the final sprint athlete in every super sprint event. These will be an out to the first buoy, over and in.

10k bike – will be an out and back. Following all signs indicating SUPER

1 mile run – will be an out and back as well. Following all signs indicating SUPER



Closes the Thursday before the event at 11:59 pm

7:30 am – 8:30 am ONLY (do not arrive late)!

Please follow the directions in your athlete emails sent the week leading up to the event.

Long Course, Sprint, Duathlon and Aquabike
$70 black Friday, $75 holiday
$10 additional for T-shirt
$10 additional for Day Of Registration

TRI – Holly Super Sprint


Items to bring to check-in
* Drivers license or picture ID
* Helpful to bring a printout of your registration confirmation

You will not be permitted to race without a picture ID.

Items you will receive at check-in
* Bib number
* Swim Cap (required to wear during the swim)

* Timing Strap
* Partner supplied samples

    Checking in another athlete
    Each athlete must pick up their own packet.  You may not check-in for another athlete.

    Exceptions: A parent or guardian may pick up for their child.

    Note: Participants 17 and under must be accompanied by a parent or legal guardian to sign event waivers.


    Bib Number
    At registration you will receive ONE bib number that the runner must wear on the front of their chest, since they will be crossing the finish line.

    Body Marking 
    All relay members will get body  marked with the bib number assigned to them, so they can all be identified on the course.

    Timing Chip and Strap
    The athlete competing in the first discipline should securely attach the timing chip to their left ankle.  The chip and strap should be handed off to the next relay member inside the Transition Area ONLY at the designated RELAY area.  Each athlete should only wear the chip on the left ankle, never on the wrist.  Do not just grab it and go.  You must make sure it is secure on your ankle before leaving the Transition Area.  Exchanging outside of the Transition Area could result in disqualification.

    Transition Area
    There will be a designated rack(s) for RELAYS only.  This is typically near one of the exit/entry points.  Please make sure all relay member’s gear is in this designated area. Even when the Transition Area is closed, relay members may still have access to the Transition Area to warm up and prepare for their discipline.

    Each athlete will be assigned a timing chip and strap. These will be available race morning unless otherwise stipulated in your race confirmation.  After check-in, proceed into transition and your bag will be at your spot on the rack.  Please ensure your bib number and timing strap match.

    You are responsible for this chip and strap.  Failure to turn it in for ANY reason will result in a $40 charge.  

    You must wear your chip and strap on your left ankle for the entire event, start to finish.  

    Following your finish you will be directed down the finish chute where there will be a chair and two bins with disinfectant solution for your chip/strap. Please remove your chip/strap, RE-VELCRO it and toss into the bin. 

    We provide all the timing and scoring services for each and every event we host.  This will be with ChronoTrack timing systems.

    Throughout the course, there will be sets of timing mats or gators, typically under structures, indicating finish, bike in, run out, swim finish, etc. You must cross over these areas.  Do NOT avoid them or attempt to jump over them.

    Every effort will be made to supply you with a swim, bike, run, transition 1, transition 2, and finish times.  However, it is explicitly expressed that the electronic timing systems are not foolproof.  They are electronics and computers which are outside in the elements and they are not perfect systems.  We along with any other timer out there can only score what is captured in a system.

    Preliminary Results
    This event will be scored live with ChronoTrack.  You may track your finish via the Athlinks app or the ChronoTrack Live app.  Search by event.  There will be QR codes at the event for you to scan.

    Your results will be posted on the event website under the RESULTS tab located on the home page as well as event page. Every effort is made to post these by the following morning or within 24 hours of the event.

    ANY and ALL timing questions and inquiries must be sent to:

    Emailing or contacting event management in any other way will not guarantee an attempt to retrieve results.

    All athletes and all relay members will be body marked with their race number.  After picking up your chip and strap please proceed to the body marking area typically designated with a large BODY MARKING flag.  You must have your bib number for this process.

    Both your biceps will be marked with your bib number, going down, not across


    Your RIGHT calf will be marked with your age

    Your LEFT calf will be marked with the event you are participating in

    T – Olympic Distance or Long Distance
    S – Sprint Distance
    SS – Super Sprint
    D – Duathlon
    * RELAYS – an R will be placed in front of the distance code you signed up for
    * AQUABIKE – an A will be placed in front of the distance code you signed up for

    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 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.  

    This is a NO AWARD event.  The lower entry fee established for this event was designed to allow you to grab a snack and depart after your finish.  Transition will be open to grab gear to depart after your finish.  


    Wetsuits are available for rent. Please rent by TUESDAY before the event. If you are interested in renting a wetsuit we have shortie, sleeveless, and full wetsuits. Please email with your name, size, and type of wetsuit. It is $50 cash paid onsite. You will be responsible for any and all damage to the wetsuit, a credit card will be put on file for potential damages. You will pick up your wetsuit at the wetsuit check-in transition check-in race morning. You will drop your wetsuit off at the post-race food tent with a 3Disciplines TEAM member ONLY, NOT a volunteer. He/She will inspect the wetsuit and check you out by returning your credit card. Again please email by Tuesday before the event to reserve your size and style.


    In our efforts to keep every race safe and fair, there are specific rules we have adopted and in some cases modified to ensure you and your families safety, as well as making the events fair for everyone.

    1.  Yelling at or using profanities in any way shape or form towards 3D staff or support crew will not be tolerated and will result in automatic disqualification and could result in a suspension from events.

    2.  Wetsuits will not be allowed in water above 80 degrees.

    3.  The filming of an athlete on a course will result in disqualification.

    4.  Pacing will not be questioned. You cannot follow or be followed by a fellow athlete, friend, or family member at any time on the course by any means.  This will be deemed pacing and therefore will result in disqualification.

    5.  Changing swim/start waves or switching events without informing event management BEFORE an event begins will result in disqualification. 

    6.  Adjusting or moving another athlete’s gear in the transition area when their gear was placed first will result in a 5:00 minute penalty.

    7.  Throwing trash on the course at any time before, during, or after will result in a 5:00 minute penalty for the first offense and disqualification on the second.  Designated trash throwing areas are only at aid station spots and approximately 25m before and after.

    8.  Failure to comply with emergency vehicles and event management staff during an event will result in automatic disqualification. Emergency vehicles and personnel have the right away at all times and an athlete must give them that right away by doing everything possible to get out of the way. 

    Event management reserves the right to postpone, change format, modify courses, or cancel the event at any time. The safety of athletes, staff, support crew, and officials is our top priority and will never be compromised.

    Event management is not responsible for late arrivals, athletes not finding a venue, misdirected, or delayed for any reason. Late arrivals will NOT be issued a chip and strap and you will not be allowed in the transition area once it is closed. Again, there will be NO refunds for any reason.

    Inclement Weather:

    Event management reserves the right to cancel an event due to inclement weather or the POTENTIAL of inclement weather.  Every attempt will be made to host an event whether in it’s advertised form or altered form.  Meaning a triathlon could be modified to a duathlon.  A 1500m swim could be made a 500m swim, etc.  A half marathon run could be made a 5k run, etc.  Under any circumstance a refund or transfer will not be issued.  Athletes safety will not be compromised.

    If an event has mandatory bike check-in, you must check in your bike during the allotted check in times typically the day before.  Failure to do so will mean you are not going to race and Again, there will be NO refunds for any reason.

    These rules are in place for a reason and deviation of them is not fair to the hundreds of athletes that follow the rules.

    First time event, Athlete Experience:
    Athletes participating in his/her first “long course” event will result in an interview with the onsite race director.  His/her experience will be considered in a personal interview with the race director on site if a question of ability to safely finish is at stake.  Failure to comply with the race director’s decision will result in a disqualification if there is an un-willingness on an athlete’s part to change events.  Safety will NOT be compromised under any circumstances.

    Age participation rules:
    Kids 17 and under may NOT compete in half ironman distance events.

    Kids must be 10 yrs. of age to compete in adult sprint events.

    The race director will have final say for anyone racing at any event.

    A lost chip will be billed directly to the athlete for a $40 fee and may result in no times for event.  It is in no way event management’s responsibility to post a time for an athlete who has lost his/her chip during an event.  It is his/her responsibility to ensure that chip is on at all times.

    An un-paid bounced check will mean you will be put on the “banned” list.  Not a great list to be on if you plan on racing in the future.  If you made a mistake with your banking, we understand, but just be sure we are paid after corrections are made.

    A t-shirt is only guaranteed if the athlete registered by the 14 day cut-off for pre-registration.

    3D has a “lost and found” bin. If you have lost something during a race, please contact us at:

    All race fees are non-refundable.  No refunds are allowed.

    Transfer to Another Race
    Transfers to another 3 Disciplines owned event are allowed.  All transfers must be completed two weeks prior to the event in which you are registered or the event you would like to transfer to whichever is sooner.  The transfer fee is $15.00 plus any potential difference in race fee.

    Events that do not fall under our transfer policy include:  I Tri for Mac.

    Transfers may be made within the current race season only.

    Transfer to Another Distance
    You may switch between the Olympic and Sprint distances at any event.  Please contact us at to change your distance or you may do so at registration at the event.  No fee to change to another event within your current event.