Atomic Man Duathlon

The Atomic Man is a duathlon, where participants start with a run, then bike, and finish with another run. 

Our Sponsors


Proceeds benefit local athletic programs!

We are proud to announce a portion of the proceeds will go to support underprivileged cross country runners in northern New Mexico! Many of our local communities cannot afford to send their children to athletic events (e.g. traveling to Albuquerque) or decent running shoes. One of our beneficiaries will be the Coronado Cross Country Team, who do not have their own uniforms when competing at meets. We hope that the Atomic Man can help children continue their love of running, biking, and other sports.

Registrants may also donate an additional amount to this cause in the donation box. Los Alamos Triatomics (the hosting organization for the Atomic Man Duathlon) is a 501c3 organization and donations are tax deductible. ONLY THE ADDITIONAL DONATION AMOUNT, NOT THE RACE REGISTRATION, IS ELIGIBLE FOR TAX DEDUCTION. 


Race Details

Date: Sat, Sep 21, 2019

Time: 8:00 AM, Fat Man

          8:30 AM, Little Boy

Location: Pinon Elementary School, 90 Grand Canyon, White Rock, NM 87544

Transition Set Up: Transition area opens up at 7:00 AM and will close at Fat Man race start, 8:00 AM.

Who can Participate

  • Individual youth (13-21)
  • Individual adults (above 21)
  • teams (2 people only)
  • Participants must be USAT member or purchase 1 day membership ($15)

Race Distances

 Fat Man (Olympic distance): 5K run, 40K Bike, 10K run

Little Boy (Sprint distance): 4K run, 12K Bike, 4K run

Registration Fees

Early (Before Sep 1)  Regular (Sep 1  - Sep 18)   Late (Sep 18)

Fat Man             $55 (Early)     $65 (Regular)      $75 (Late)

Fat Man Relay   $80 (Early)     $90 (Regular)     $100 (Late)

Little Boy            $40 (Early)     $50 (Regular)      $60 (Late)

Little Boy Relay  $70 (Early)     $80 (Regular)      $90 (Late)

Youth                  Individual $40,  Relay (all must be under 21) $70

Refund Policy

No Refunds. Transfer to another participant or team in 2019 allowed until Sep 18.

No transfer to future years.

Packet Pick Up

Day Before (Fri Sep 20, 2019): 4:30 PM - 6:30 PM

Day Of (Sat Sep 21, 2019): 7:00 AM - 7:45 AM

Location: Pinon Park, White Rock, NM 

We will have race day registrations so encourage friends who haven’t signed up to join you. You should bring with you a copy of your current USAT membership form plus a photo ID to receive your race packet. If you are not a USAT member during the electronic registration you should have also paid for a one-day USAT registration fee. As a reminder only you may pick up your race materials. If you are participating as a part of a relay, you will both need to be present.


Please plan on parking at the Pinon Park near the tennis courts versus along the side streets near the race venue.

Race Day Schedule

  • 7:00 AM - 7:45 AM Packet pickup, late registrations, and timing chip pickup.
  • 7:50 AM transition area closes for both Fat Man and Little Boy Participants.
  • 7:50 AM general race meeting describing the courses and briefing on the rules (read the common rule violations found as a link at below).
  • 8:00 AM Fat Man participants begin.
  • 8:30 AM Little Boy participants begin.
  • At approximately 11:30 AM a combined awards ceremony and raffles (We recognize that most of the short course athletes will be finished before 10:30, we still encourage you to stick around for your award)
  • 7:00 AM - 12:30 PM road closure on Grand Canyon between Sherwood and Canada Way

Most Common Rules Violations

Please be aware of the rules for participating in a duathlon as sanctioned by USA Triathlon. Click on the button to learn about the rules and most common violations. 

Race Conditions

This particular course is held on open roadways so remember to stay to the right of the road when you are cycling and to the left of the road while running. Keep your heads up and be aware of your surroundings. The LAPD will be on the corner of Grand Canyon/NM 4 as well as another at the respective turn arounds to direct vehicular traffic. There will be a volunteer posted at the bike turnarounds.

There will be two aide stations on the run course serving your choice of water and Base

Performance Hydro. Remember there will not be an aide station on the bike course thus you should be prepared with enough water/nutrition to support your needs.


  1. Be thankful—Thank a volunteer while out there.
  2. Be courteous.
  3. Have fun.
  4. BE SAFE.


Any great endurance events needs the wonderful support from the community. If you decide to not race, consider volunteering!

Little Boy Course Maps

Little Boy Run Course


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Little Boy Bike Course


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Little Boy Run Course (satellite)


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Little Boy Bike Course (satellite)


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Fat Man Course Maps

Note that the difference between the 5K run and the 10K run is you the latter is two loops.

Fat Man 5K Run Course


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Fat Man Bike Course


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Fat Man 5K Run Course (satellite)


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Fat Man Bike Course (satellite)


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Fat Man 10K Run Course


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Fat Man 10K Run Course (satellite)


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