Marathon Swims, London Aquatics Centre 2026

Marathon Swims is London's marathon of swimming. The annual event at the London Aquatics Centre, on Queen Elizabeth Olympic Park is in its 8th year. Swimming now has its own marathon. Marathon Swims 2026 is hosted at the LAC on Sunday 1 November 2026. The event offers various distances including the Marathon 10k, Half Marathon 5k, the 1k Challenge, and the Team 10k. A virtual challenge is also available from 1-30 November 2026, allowing participants to swim a Marathon 10k, Ultramarathon 25k or Ultramarathon 50k over 30 days from any swimming venue. The event uses RFID chip technology for instant results.