The Box End Beast Triathlon – 1st August 2021

The Box End Beast Triathlon


This inaugural event, brings the challenge of half-ironman, middle-distance triathlon to Box End. The race involves a 2.2km swim in the crystal clear Box End Lake, an 85km road bike on fast country roads, and finishing with a 20km offroad run.

For those who don’t want to take part in the run, there is an Aquabike (swim-bike) option, and for those who would like to compete as a team, there is a relay option, with or 2 or 3 individuals sharing the disciplines between them.

The triathlon will begin at 07:00am. This will be a time trial format start. Swimmers will start 1 by 1, with the fastest predicted swim times being set off first.

Many people are understandably nervous regarding entering events again and we want to assure you that we take every measure we can to organise a safe, socially distanced event. To see this in action watch our video Covid-19 Safety at ActiveTrainingWorld Running and Triathlon Events.

This event is open to everyone, regardless of ability.

This is a non-draft legal race.

  • Location: Box End Lakes,Box End Rd, Bedford MK43 8RN
  • Start times: From 7:00am. Wave times will be published closer to the event
  • Distances: Middle Distance Triathlon = 2250m Swim, 85Km Bike, 20Km Run | Middle Distance Aquabike = 2250m Swim, 85Km Bike
  • Minimum Age: Middle: 18yrs (on 31/12/2021)
  • Activity: Swimming, Cycling & Running

  • Open to: Solo participants and  relay teams

  • Entry Fee: 6 options from just £75  (Details below)

  • Event Cancellation Policy: We want you to book with confidence so, if this event can no longer go ahead, and an alternative date isn’t found, you will be offered a virtual run or a refund of your entry fee (Booking fees are non-refundable)
  • Additional Fees: A 6% booking fee will be added at the checkout
  • Event Organiser: Active Training World
  • Organiser Email:

Race numbers will be collected at the the event venue on the morning of the race.

Registration opens at: 06.00am

The day license for Non-BTF members is included in the entry price.

There will be an online race briefing made available before the event, it is mandatory to have watched this as there will be no pre-race briefing on the day.

Please arrive in sufficient time to collect your race number.


The swim takes place in the crystal clear water of Box End Lake. The lake is primarily used for wakeboarding, so contains lots of wake-boarding jumps. The route is three full laps of the 750m clock-wise oval around the lake.

The bike route consists of a smaller lap followed by two larger laps that include long straights giving you a great chance to get down and aero as you speed through the Bedfordshire countryside.

Middle Distance bike course

The Run route is roughly 100m from transition to a 5km loop which the competitors complete four times for the middle distance,  before a 100m run into the finish making the run distance 20.2km. The route is completely off-road, but is very changeable, which makes for fantastic and exciting racing, and the multi-lap format enables great support and encouragement as you pass transition.

Run Lap


Swim – Open water | Bike – Road | Run – Off-road

We actively welcome support and involvement from local communities, businesses and individuals. If you would like to find out more about marshalling, sponsorship or group bookings please contact us at the address below.

If you would like more info on this event please use the email address below:

Finishers medal for all!

There will be no prizegiving on the day.

There will be full results on the chip timing website.


Need help with your running? Whether this is your first triathlon and you want to know how to prepare, or you are looking to smash your personal best – following a training plan will increase your chances of achieving your goals.

Visit the ATW Shop to submit your requirements for a fully customised run training plan.

It is important that you are fit to run and have not experienced any Covid-19 symptoms in the 14 days leading up to the event.

Race Numbers
Please wear your number pinned to the front and back of your vest or alternatively, using a race belt, rotate the race number to the back for the bike leg and the front for the run leg.

Parking is available at Box End Lakes.

Changing Facilities
We will not be providing a changing area, therefore please come changed and ready to race.

Baggage Drop
There will be an informal baggage drop area for you to leave any belongings within the transition area.

There will be toilets available.

Water Station
There will be a High5 & water stations on the bike and on the run route. There will be water available, self-service style, at the finish.

If you are unable to attend due to illness, injury, family bereavement, jury service you will only be eligible for a refund on production of official evidence: Positive Covid-19 test result, Doctor’s note, Death Certificate etc.

Event Cancellation
If the event should have to be cancelled due to reasons beyond ATW’s control (for example, severe weather, local or national lockdown) entrants will be given a range of options to choose from, which will include a refund of their entry fee (less the booking fee).

By entering this event you agree to the below terms and conditions:

Your details will kept in accordance with the Active Training World Privacy Policy

Your name, date of birth and email details will be onto the chip timing company. Personal details will be deleted 1 week after the event.

Where specified on the booking form any medical information will be passed onto the medical team present at the event. 


1) I am over the age of 18 (Middle Distance, Aquabike)

2)  I declare that I am medically fit to compete & understand that I do so entirely at my own risk.

3) I understand that I enter the race at my own risk and that no person(s) or organisation(s) will be held responsible for any accident, injury or loss to myself, prior to, during or after the event.

4) I understand the organisers reserve the right to alter the arrangements and conditions, should circumstances require.

5)  By entering this event, I accept BTF rule.


The event is being officially timed by Event Chip Timing and the results will be available on the day at

Ticket Details

  • If this is your first registration on our new booking platform but had an ATW account previously, your old ATW log in details are now invalid and a new account will be created for you when you book your first event without logging in.
  • If you are booking more than 1 place, please ensure that you complete the individual details for each attendee accurately answering all the questions on their behalf.
  • Relay entries should be completed with lead entrant’s details only. Additional team members’ details will be taken at Registration on the day
  • The BTF Day License for the event is included in the price of a Non BTF Entry.
  • Prices do not include 6% booking fee. This will be added at checkout.
Details Price Qty
Box End Middle Distance Triathlon Entry Non BTF Member£91.00 (GBP)*  
Box End Middle Distance Triathlon Entry BTF Member£85.00 (GBP)*  
Box End Middle Distance Aquabike Entry Non BTF Member£81.00 (GBP)*  
Box End Middle Distance Aquabike Entry BTF Member£75.00 (GBP)*  
Box End Middle Distance Relay Entry Non BTF Member£101.00 (GBP)*  
Box End Middle Distance Relay Entry BTF Member£95.00 (GBP)*  

Price does not include booking fee

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