Trifarm | The Trifarm Double Header
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The Trifarm Double Header


The Trifarm Double Header 2020

The Trifarm Double Header is a series of two races in the early summer of 2020. Each leg will be an individual sprint triathlon comprising a single 800m lap of the Trifarm lake, a 18km cycle leg on the open public roads around Trifarm, and then a 5k run made up of 5 laps of the perimeter path around the Trifarm Lake.


Prizes will be awarded for each individual race, as well as the Double Header prizes for the 1st,2nd and 3rd males and females who have competed in all three races.


Event Dates

  • Double Header Race 1 is scheduled for May 17, 2020.
  • Double Header Race 2 is scheduled for August 2, 2020.


TimeWhatRace NumberWhere
06:45Racking and registration startsTransition & Registration
07:45Racking closesTransition
07:55Wave 1 briefingRace start
08:00Wave 1 start1-50Race start
08:20Wave 2 briefingRace start
08:25Wave 2 start51-100Race start
08:40Wave 3 briefingRace start
08:45Wave 3 start101-150Race start
08:55Wave 4 briefingRace start
09:00Wave 4 start151-200Race start
10:45Collect kitTransition

Course Details

The swim course (light blue) and perimeter path run course are shown below.

The 18k bike route is shown in the figure below.

Download a GPX file for the bike route here (ZIP file).

Download GPX File


The races will be based at Trifarm, near Boreham in Essex.  Competitors will be able to park on site.  Changing and registration will all be based around the normal Trifarm Reception area.  A secure transition area will be located near the trifarm entrance gate, where the swim leg will start and finish.


The address for Trifarm is:



Church Road



Essex, CM3 3EJ


Cost & Entry

Select you preferred race(s) below. You will be directed to the British Triathlon Federation’s website to complete you entry.

Race 1



For BTF members


Non-members may buy a day licence with the entry for an extra £5


Enter Race 1 Now

Race 2



For BTF members


Non-members may buy a day licence with the entry for an extra £5


Enter Race 2 Now


Race Rules

Download the race rules here (PDF file):

Race Rules