SEPTEMBER 11th, 2021

HARVEST MOON TRIATHLON EVENT DESCRIPTION: The long course triathlon is a 1.2 mile swim in the crystal clear waters of Boulder Reservoir, a rolling 56 mile country ride on the roads of Boulder County (2-laps), and a scenic run capped off with a Slip n' Slide Finish  The run course is a 2-lap loop half run course around the reservoir on the dirt roads and trails!  The Harvest Moon Triathlon is Colorado's longest running and most affordable long course.  Why the small participant cap?  Easy, we want to maintain a fun, laid back, yet competitive race atmosphere.  To us you're more than a number and we want every athlete experience to be the best it can possibly be, whether it's your 1st long course or 10th year racing!  So mark you calendars for September.  The Harvest Moon Triathlon truly is where Colorado comes to race. 


HARVEST MOON DUATHLON EVENT DESCRIPTION: The Long Course Duathlon changes out the swim for a 5k run to start things out.  Duathletes will all begin in the same wave after all of the swimmers have entered the water. An aid station will be set up at the finish of the 5K Run. Following the opening run, racers will then follow the same bike and second run courses as the triathletes. There will be one aid station at mile-3 of the first 5K run. The first 5k is rolling terrain with a mix of hard packed trail and wide cement running paths with a dirt shoulder. The 5430 Triathlon, Colorado's only long-course duathlon, attracts 100 athletes every year competing for great prizes and raffles from our sponsors!The Duathlon wave will take off at 7:30. Between us you have the hardest event of the day having to run twice, so we'd like to get you out of the sun before the heat of the day! Plus you'll hit the post race buffet and massage tent that much sooner!


HARVEST MOON AQUABIKE EVENT DESCRIPTION: The Long Course Aquabike is the hottest growing segment of the Long Course Festival and has quickly become one of the largest long course aquabike's in the nation.  The Aquabike (1.2m Swim / 56m Bike) will be the final swim wave to take off.  After finishing the 56 mile bike all athletes will rack their bikes and exit transition as if starting the run, 200 meters into the run course athletes will turn off into the finish line.  All returning athletes, YES, the Slip n' Slide finish line is back!  Aquabike athletes will be the first to the massage tent, first to the food tent, and we'll start awards at 1:30pm.  All aquabike athletes will be able to remove their bike from transition area after 12:30pm.  The Harvest Moon Aquabike, Colorado's only long-course aquabike, attracts 150 athletes every year competing for great prizes and raffles from our sponsors!


This event is limited to 600 competitors; please register early to take advantage of the discounted pricing as we've sold out in 2010-2019



Triathlon Individual: $170 until 3/1, $180 until 3/31, $190 until 6/1, then $200 until 9/5 at midnight
Aquabike Individual: $130 until 3/1, $140 until 3/31, $150 until 6/1, $160 until 9/5 at midnight
Duathlon Individual: $130 until 3/1 $140 until 3/31, $150 until 6/1 , $160 until 9/5 at midnight


Triathlon Relay: $195 until 3/1, $210 until 9/5

Duathlon or Aquabike Relay: $140 until 3/1, $160 until 9/5


Colorado Triathlon or Duathlon Series Package - Includes Colorado Series Backpack

Package includes the Colorado Sprint, Boulder Peak, and Harvest Moon Long Course Triathlon

$330 from 1/1 thru 3/31, $350 until 5/30 at midnight, $370 race week of the Colorado Triathlon

[Note: Triathlon package offer expires after the Colorado Triathlon]




The first timers swim wave will go last. This wave will be capped at 50 athletes each to maintain a small & friendly 1st race experience.  

Please note: athletes in this wave will not be eligible for age-group awards.  When you register simply check off first timer division instead of age-group division to enter this wave.  Also note that this wave is for athletes competing in their first ever triathlon or brand new to the sport.



Race Day Schedule Saturday September 11th, 2021 (Boulder Reservoir)

5:00 a.m. - Gate Opens to Boulder Reservoir

6:00 a.m. - Body Marking and Chip Distribution

7:20 a.m. - All Bikes Must Be in Transition 

7:30 a.m. - Triathlon & Duathlon  - Wave Starts Begin

9:45am - Swim Cut-Off

11:00 - Post Race Food Serving

2:00 p.m. - Mandatory Bike Cut-Off

1:00 p.m. - Transition Area Re-Opens to claim equipment

1:30 p.m. - Aquabike Awards & Raffle

2:45 p.m. - Tri & Du Awards & Raffle

3:50 p.m. - Race Cut-Off


1) Boulder Packet Pick-Up at Colorado Multisport - Friday 9/10 - 5:00pm-7:00pm

Village Shopping Center, 2480 Canyon Blvd M2, Boulder, CO 80302

2) Westminster at Play Tri - Thursday 9/8 - 5:00pm-7:00pm

(Centrally located just off I-25) 13640 Orchard Pkwy Suite 100, Westminster, CO 80023


Hampton Inn & Suites

6333 Lookout Rd, Boulder, CO 80301  -  (303) 530-3300

Friday - Saturday- discounted rate of $189

To make a reservation please CLICK HERE!

Please note: You can come to either packet pick-up and do not need to let us know which pre-race packet pick-up you're attending.  If you did not sign-up for the $5 race day pick-up and can not make the pre-race packet pick-ups just send an e-mail to Lance@withoutlimits.com letting us know you'd like to pick-up race morning, bring $5 cash with you, and plan on arriving 10min earlier than normal.


Race Day Pick-Up:  When you register you'll be given the option to pick-up your packet race morning for $5.  Why the fee?  While we don't want to charge any extra its serves more as a deterant so we don't have a 550 person line race morning. This packet pickup "convenience" fee is used to cover the cost in staffing the additional trained personnel needed to facilitate this extra special service.  Adding it to online reg also allows us to know what kind of numbers to expect race morning.  We love having athletes from Colorado Springs, the mountains, and Wyoming, and hate making you take a special trip on Fri/Sat.  The gas alone is probably $5 


USA TRIATHLON ANNUAL MEMBERS: If you're an annual USA TRIATHLON Member you must bring your valid USA Triathlon card and a valid photo ID with you to packet pick up!  


NON-USA TRIATHLON MEMBERS: If you're not a USA TRIATHLON Member then you already purchased the 1-day ($15) license when you registered and you're all set.  If you did a print and mail registration and forgot the $15 we have it in our records and you'll be able to pay the fee at packet pick-up. Please remember a valid photo ID.  As per USA TRIATHLON rules you must pick up your packet as we're not allowed to release it to friends, husbands, wives, or relatives. 




REFUNDS: There are no refunds of entry fees should the event be cancelled.  A reason for cancellation includes, but is not limited to; weather related emergency, a late breaking change in the state re-opening guidelines pertaining to COVID-19, or new restrictions imposed by the county health department.  Should this event be cancelled we will rollover your entry to 2022. 



We will permit a switch to another non-closed Without Limits Triathlon race in the same calendar year as long as we receive at Without Limits Productions at least 30 days prior to the race you enrolled in, your written refund or switch request. No refunds or switches inside 30 days.  Written means via e-mail, FAX or mailed letter. We will no longer accept switches out of races from one year to the following year.


Up to the Monday of race week, you may switch from division to division, Age Group to Elite or vise-versa...and an individual may also switch to a Relay Team. By that Wednesday, we will need your written request for any changes (e-mailed).  If a change to Relay Team, we will need the completed entry forms of your Team members also by that Monday.  After Monday - NO DIVISION SWITCHES!



Another person may take your race slot and you can make this change on your TriReg account.  There is a $10 processing fee for athlete changes. 



We reserve the right to make course changes up until race morning to improve the athlete experience or for the safety of the athletes competing.

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