Marathon Swims 2018 has announced it will be returning to the London Aquatics Centre on 10th and 11th November 2018.
The event sold out in its first year and this year it has added an extra day to give participants a choice of race days and increase capacity due to high demand.
Marathon Swims is an indoor, pool-based marathon 10km, half marathon 5km and a 1km challenge distance event.
Founding event partners Better and Cancer Research UK have renewed their partnerships, along with new partner, swimming holiday provider, Swim Quest.

Founder of Marathon Swims, Diccon Loy, commented: “We have been delighted at the response and interest in Marathon Swims. To engage such great partners and sell out in our first year proved to us that swimming as a sport has great potential for growth and development. We set out to create an experience and challenge like no other in the pool.
“We wanted to deliver the same sense of occasion and challenge as the London Marathon delivers for runners. Swimming now has its own marathon and we’re excited about the prospects of developing a national series of events.”
Andrew Clark, head of swimming for London Aquatics Centre’s operator Better added: “We are a proud founding partner of the Marathon Swims event and delighted to support the event for its second year. At Better, we have delivered an innovative approach to operations at London Aquatics Centre and at over 250 other public leisure centres. Marathon Swims is an extension of this innovation, having the opportunity to take part in this fantastic event will provide motivation for our customers to swim more, train and improve in readiness for a significant challenge, and support our aim to improve the health and well-being of the local communities we work in.”
Entries to Marathon Swims: London are now open and expected to sell out before event day. Other Marathon Swims events are set to launch later in the year.