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Harvest Moon Triathlon

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The Harvest Moon Triathlon takes place at the beautiful Boulder Reservoir. on September 15th, 2019. Est. in 2000 this Colorado classic provides the veterans to beginners a challenging, affordable, and competitive race with a local flavor. Whether this is your final event of the season, or a tune-up for a fall long course triathlon, don't miss the Harvest Moon! The Aquabike portion is one of the fastest growing Aquabikes in the nation, while the duathlon is Colorado's only long-course duathlon.

How to enter the Harvest Moon Triathlon

  1. Triathlon

    Triathlon: Swim 1.2km, Bike 56km, Run 12.9km
    Event passed
  2. Duathlon

    Duathlon: Run 5km, Bike 56mi, Run 12.9mi
    Event passed
  3. Aquabike

    Aquabike: Swim 1.2mi, Bike 56mi
    Event passed

Harvest Moon Triathlon routes

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.

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!

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!

Event Details

Raceday Logistics
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

Harvest Moon Triathlon weather forecast

Partly cloudy throughout the day.

Predicted highs
Predicted lows
IconLight breeze possible, up to 5mph

Meet the organizer

Organizer's website

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