Grafham Water Swim Event – 19th September 2021

Grafham Water Swim Event

Join us at the beautiful and iconic Grafham Water for an Swim Event.

Active Training World (ATW) are now offering swims at most of our triathlon events as part of our event programme.

This Swim Event takes place alongside the day’s Standard Distance Triathlon and Swim/Cycle/Run Festival and provides the opportunity for a chip-timed swim race in the crystal-blue of Grafham Water, over your choice of distances varying from 1500m up to 4.5km.

As a friendly swim event it is open to everyone, regardless of ability and, as with all our swims, water safety will be on hand to ensure you have a safe and enjoyable experience.

We also know that not everyone is a fan of a mass swim start so our starts are flexible. Depending on COVID restrictions starts will be in a time trial format where you will start 1 by 1, in 20 second intervals, with the fastest predicted swim times being set off first. Or in small waves, allowing you to experience the thrill of a smaller mass start, BUT with the option of being started off behind the field, like in our time-trial starts, so you have a clear run and the best chance of your personal best!

After the event, Grafham Water has a cafe serving warm food.


  • Location: Grafham Water Visitor Centre, Marlow Park, Grafham, Huntingdon, Cambs, PE28 0BH
  • Start times: All distances 7:05am
  • Distances: 1500m, 3km (2 laps), 4.5km (3 laps)
  • Minimum Age: No minimum age. Parental Consent required for Under 16yrs (on 19/09/2021)
  • Activity: Swimming

  • Open to: Solo participants

  • Wetsuits: The choice of wearing skins or wetsuits is up to the competitors, subject to compliance with SH2OUT guidance as below.
  • Cut-off time: 2hrs20 (all swimmers must have finished by 10am).
  • Entry Fee: Options from just £30 per person.

  • 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 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: events@activetrainingworld.co.uk

Swim hats and timing chips will be collected at the the event venue on the morning of the race.

Registration opens at: 06:45

An online briefing will be provided with final details the week before the event. This will identify any event changes/amendments resulting from changes to Government Covid restrictions.

Please arrive in sufficient time to collect your swim hat and timing chip.

The swim takes place in the beautiful and iconic Grafham Water using a 1500m lap. The start format will use small waves or individual starts depending on your individual choice or restrictions in place at the time.
1500m Swim Lap

This event is open to everyone, regardless of ability and there are plenty of activities at the venue to keep the whole family entertained while you race.


The choice of wearing skins or wetsuits is up to the competitors, subject to compliance with SH2OUT guidance:

  • Water temp < 11 degrees – no children should swim and wetsuits must be worn by adults.
  • Water temp 11-14 degrees – Children must wear wetsuits, recommended (but optional) wetsuits for adults.
  • Water temp 15-23 degrees – Wetsuits optional for all.
  • Water temp 23+ degrees – wetsuits not recommended for adults (but optional especially for nervous or beginner swimmers)


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.

Spectators are currently not allowed. If this situation should change we will update this page.

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 swimming? Whether this is your first ActiveSwim 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 swim 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
Event swim caps must be worn.

Parking is available at Grafham Water. Details will be included in the final details.

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.

There will be toilets available.

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 understand Parental Consent is required for all Big Swim entrants under 16yrs 

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

3) I understand that I take part 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.


The event is being officially timed by Event Chip Timing and the results will be available on the day at http://results.eventchiptiming.com

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.
  • Prices do not include 6% booking fee. This will be added at checkout.
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