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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.

How to enter the Cowman Duathlon

  1. Cowman Duathlon

    Duathlon: Run 21km, Bike 90km, Run 10km
    Event passed
  2. Calfman Duathlon

    Duathlon: Run 10km, Bike 45km, Run 5km
    Event passed
  3. Stampede Duathlon

    Duathlon: Run 5km, Bike 22km, Run 5km
    Event passed
  4. Longhorn Classic

    Duathlon: Run 10km, Bike 60km, Run 10km
    Event passed

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 16th, October at the British Triathlon website.

Event Details

What’s Included
  • Race entry
  • 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
Raceday Logistics


12:00 - 14:00 - Registration Open (Saturday 17th October)

05:30 - Registration Opens (Sunday 18th October)

06:00 - 08:45 - Transition Open

07:30 - Cowman Start

08:15 - Longhorn & Calfman Start

08:45 - 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.


Spectators are encouraged to get out and cheer on their family and friends as they take on this epic challenge. The beautiful Emberton Country Park makes for a lovely picnic spot and a great way to unwind after the event.


New to 2020, 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.

Cowman Duathlon weather forecast

Mostly cloudy throughout the day.

Predicted highs
Predicted lows
IconLight breeze possible, up to 7mph

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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