Latest Events Swim Serpentine The host for the open water swimming competitions at the London 2012 Olympic Games, Hyde Park's beautiful Serpentine is the perfect spot for some late summer swimming in the sun. Distances range from half a mile to two miles. Make like Dory, and just keep swimming. When: Saturday 26th September. Start times throughout the day, starting from around 7am. Where: Serpentine Lido, Hyde Park, London Interested? Find out more or register your place by contacting our Fundraising Team below: I'm interested! If you're already taking part in this challenge event, set up your own fundraising page on our website. This way, 100% of the money raised goes straight to Hestia.