4 August 2019

August 2019 sees the return of the Cowman, Calfman and Stampede triathlon events at the stunning venue of Emberton Sailing Club in Emberton Country Park.

The Cowman is a half ironman distance (1.9km swim, 90km bike, 21.1km run), and the Calfman is just over a standard distance (900m swim, 46km bike, 10km run). The Stampede (introduced in 2018) is a sprint distance (750m swim, 22k bike, 5.25k run).

The swim takes place in the lake adjacent to the sailing club, with the bike course heading out around the local area (2 laps for Cowman, 1 lap for Calfman, short lap for the Stampede), and the run course circulating the lake featuring both on and off road sections (4 laps for Cowman, 2 laps for Calfman, 1 lap for the Stampede).

The events can be tackled as an individual, or the longer ones can be done as a relay team of two or three, with prizes across the board for individual age groups and teams.

Entry Fees

Cowman Individual (BTF Member) £110
Cowman Individual (Non-BTF Member) £115
Cowman Relay £135
Calfman Individual (BTF Member) £60
Calfman Individual (Non-BTF Member) £65
Calfman Relay £80
Stampede Sprint (BTF Member) £50
Stampede Sprint (Non-BTF Member) £55

Please note, if you have registered for the race using a BTF membership number you MUST present your membership card at registration or you will be required to pay a supplement for a Day Licence. Relay teams will get the BTF discount where one or more members of the team are BTF members.

An administration fee of 6% will be applied to each order by our online entry system partner, Results Base.


Our official photograpers are sportcam and images will be availabe within your personal results page from Monday.

Resultsbase and Big Cow  Events are proudly supporting our Charity Partner, the NSPCC , with The Cowman  2019.  

Please consider helping us raise vital funds needed to help protect children in Milton Keynes and nationally. You can do this through a simple donation, purchasing an NSPCC running vest or setting up a Just Giving page through our registration page for this event..

Who are NSPCC? -   “We’re leading the fight against child abuse in the UK and Channel Islands. We help children who’ve been abused to rebuild their lives, we protect children at risk, and we find the best ways of preventing child abuse from ever happening.”

Want to find out more?


 Event information
04 August 2019
Emberton Park, Olney

Great Britain
Registration is closed
Starts at 07:00

Price per participant
Price £115.00 + fee
Fee (per order): 6%
Starts at 09:00

Price per participant
Price £65.00 + fee
Fee (per order): 6%
Starts at 09:40

Price per participant
Price £55.00 + fee
Fee (per order): 6%

 More information

Registered charity number 216401. NSPCC, charity registered in Scotland, charity number SC037717.


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BCS Events

In case of questions about the event please contact BCS Events:

01908 585037