Event Registration

Details of the event/coaching course you want to register for should be below – just complete the online registration form and complete the online payment section to confirm your place.

If you can’t find the event or coaching you want here please click here to search our calendar of events….

If you have any problems please email us at info@swimyourswim.com

12 Hour Endurance Swim - Pairs Entry




To complete this 12 hour marathon open water swimming event you will need to swim one mile on the hour every hour for twelve hours. This challenge can be undertaken as an individual or as a pair (alternating every hour).

The first mile of your epic challenge will commence at 20:00 on Friday 21st June 2024 and the final mile must be completed by 08:00 on Saturday 22rd June 2024.

Please do not underestimate the magnitude of this challenge. You must be very competent and experienced in open water swimming, night swimming, cold water management and endurance events.


The event will take place at Hatfield Outdoor Activity Centre in Doncaster with camping available on site via pitchup.com


Event - Outline Information

  • Your aim is to complete one mile on the hour every hour for 12 hours
  • A mile will require two full loops of the lake outside of the swim buoys
  • All swimmers will set off together every hour on the hour; you must be in the water ready when the starting horn goes off. If you are not in the water on time you will be withdrawn from the event
  • . A rolling start may be adopted.
  • There will be one controlled ingress and egress point for all swimmers
  • You can eat, drink, visit the loo, sleep, talk with friends or even funnily enough rest during rest periods but strictly no alcohol.
  • You may wear any swim suit or wetsuit. You may not be naked
  • Swim hats are essential, ear plugs are optional but fins, hand paddles, snorkels, pull buoys and propulsive devices of any kind are not permitted
  • You may swim any stroke or combination of strokes.
  • Swimmers must be fully respectful of each other, encouraging to all in and out of the water
  • Neither glass or barbeques are permitted at the lake
  • Children must be supervised by parents at all times and kept away from the water.
  • All swimmers take part knowing that they take full responsibility for their actions, have satisfied themselves of their fitness, have taken all reasonable steps to prepare for the challenge and understand that neither the organisers nor anyone connected with the event, accept responsibility for the swimmers health and well-being, before, during or after the event. The organisers will however, take all reasonable risk factors into account in order to maintain a well-run and safe environment for you to undertake the event.
  • Numbers in the 12 hour challenge are strictly limited.

Event – Swimmers will be provided with;

  • Changing rooms
  • Toilet facilities & showers
  • Hot drinks
  • Hot water for hot water bottles
  • Water safety & First aid
  • Event T shirt & completion certificate

*Per Solo OR Pair we will include in your entry fee one hot drink per hour for every swimmer – separate food packages will be available to purchase from the venue.

In the event of the swim being cancelled due to poor weather conditions or other incidents that are beyond the control of the SYS team, SYS will endeavour to re-arrange the swim at another time in the year*.

Once a swim has been booked no refunds will be available, but your place may be transferable to another swimmer who meets all the SYS swim criteria.

If you have to relinquish your place please contact us immediately on info@swimyourswim.com

Your place on the swim will not be confirmed until full payment is received by SYS.  Should you be unable to make the full payment for the swim your place may be offered to someone else.

*SYS will do their VERY best to re-run events that have to be called off for these reasons but there is no guarantee that this can be achieved within the same year.  We would hate for an event/swim to be completely cancelled, but think it best that you know there is a chance of this happening from the outset.  Refunds in this instance would be at the discretion of the SYS team.  For more information please email us on info@swimyourswim.com

Price: £125.00

Start Time: 8:00 pm
End Time: 8:00 am

Date: 21/06/2024

Hatfield Outdoor Activity Centre
Old Thorne Road
Doncaster, South Yorkshire
United Kingdom
Map and Directions

Registration Details

Your Address

Emergency Contact Information

Details of whom we should contact in the event of an emergency/accident.

Medical Information

Information about your health and medical conditions

Open Water Swimming Experience

Information about your swimming experience and ability to date

Electronic Signature

Event Info

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