What is Open Water Swimathon?

Open Water Swimathon 2019, which took place on Saturday 7 and Sunday 8 September, is a swimming and fundraising challenge held at stunning open water venues across the country. With a range of distances available (from 500m up to 5k) for individuals and teams, this event is ideal for swimmers of all abilities, from experienced open water swimmers to those transferring from the pool to the open water for the first time!

Open Water Swimathon aims to raise as much money as possible for Cancer Research UK and Marie Curie, two causes close to the nation’s hearts. This is your chance to fundraise for both incredible causes.

500m (individual)

The popular 500m option is a great choice if you're looking to try the open water for the first time, or if you haven't swum outdoors for a while. It's the equivalent of 20 laps of a 25m pool and will be the perfect introduction to the open water!

1.5k (individual or team)

This distance is suitable for all abilities, and you can complete it alone or as part of a team with your friends or family. If you fancy working your way up to what equals 60 lengths of 25m pool, whilst raising vital funds for our charities, then this is for you.

2.5k (individual)

2.5k is the perfect event if you're after a longer challenge and have maybe tried a few open water swims before. Are you going to great lengths to get sponsored? Then the equivalent of 100 lengths of a 25m pool is for you. So jump in and make some proper fundraising waves.

5k (individual or team)

Suited to experienced and confident swimmers, this is the ultimate open water challenge, considered to be a swimming half marathon! This distance will leave everyone (including you) breathless, so your efforts will be rewarded with lots of sponsorship. Don't want to tackle it alone? Round up your water-loving friends and take on this distance together!


Not close enough to any of the host venues or can't make any of their sessions? The MySwimathon challenge might be for you! Find out more about our flexible entry option here