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Cowman Duathlon

Event details


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The Cowman Duathlon has something for everybody. With race options from the shorter Stampede to the longer Cowman, competitors of all stripes will be able to find the right race for them. Come on out for the finisher's t-shirt and the awesome medal.
C-19 Plan
Big Cow Events has confirmed that this event will be going ahead as planned on Saturday 9th Oct 2021 in accordance with the COVID-19 safety measures. Learn more

How to enter the Cowman Duathlon

  1. Cowman Duathlon

    Duathlon: Run 21km, Bike 90km, Run 10km
    Book Now
  2. Calfman Duathlon

    Duathlon: Run 10km, Bike 45km, Run 5km
    Book Now
  3. Stampede Duathlon

    Duathlon: Run 5km, Bike 20km, Run 5km
    Book Now
  4. Longhorn Classic

    Duathlon: Run 10km, Bike 60km, Run 10km
    Book Now

Cowman Duathlon routes

This event takes place in the stunning Emberton Country Park in support of Willen Hospice. The race is a tried and tested route that participants love. This event has four distance options ranging from the brief Stampede option all the way to the Cowman. Each route involves a varying number of laps through the course and marshals will line the route and guide you to the finish line.

Route Details:

Cowman: 21k Run, 90k Bike, 10k Run

Longhorn Classic: 10k Run, 60k Bike, 10k Run

Calfman (Age-Group Qualifier): 10k Run, 45k Bike, 5k Run

Stampede: 5k Run, 20k Bike, 5k Run

Please Note: If you intend to qualify for the British Triathlon GB Age-Group Team at the Calfman Duathlon you must register your intent to qualify by 5PM on Friday at the British Triathlon website.

Event Details

  • Unique finisher's medal
  • Participators t-shirt
  • Professional chip timing
  • Online results
  • Clearly marked and marshalled course
  • Bag drop
  • Refreshment & Feed stations on course
  • Prizes awarded to top relay teams



12:00 - 15:00 Registration Open


06:00 Registration/Transition Opens

07:30 Cowman Start

08:15 Longhorn

08:30 Calfman Start

08:55 Stampede Start

Please Note: There will be race briefings 15 minutes before the start of each event. The Calfman Duathlon is the only GB qualifying race taking part at this event.

You are encouraged to arrive at least an hour and a half before the start of your event to give you enough time to get parked, registered and warmed up.

Big Cow Events is offering free race entries to volunteers who help out at their events. Please reach out directly to Big Cow Events to find out more information.

Frequently Asked Questions

Is the Calfman Duathlon a European Age-Group Qualifying event?
Yes, this event is an age-group qualifying event and if you intend to use it to qualify then you will need to register your intent by October 5th latest. Note - this is the only GB qualifying race at the event.
Will there be awards for the Cowman Duathlon?
Yes, there will be prizes awarded to the top male & female performances across all events.
Is there a bag drop at the Cowman Duathlon?
Yes, there will be a manned bag drop for participants belongings. However, these are left at the owners discretion and Big Cow Events is not responsible for any lost or missing items.
When will I receive my race pack for the Cowman Duathlon?
Race packs will not be sent out via mail, instead they can be collected on race day at the event village during registration.
What cause does the Cowman Duathlon support?
The Cowman Duathlon operates in support of the Willen Hospice.

Meet the organiser

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Big Cow Sports is a sports events company established in 2003 in Milton Keynes. Hosting numerous events in and around the city from running events to multi-sport events such as triathlons and duathlons, our aim at Big Cow Sports is to get people up and out, exploring the beautiful scenery that Milton Keynes has to offer whilst having fun and getting active!


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Tickets £34–£80