Taking place at Dorney Lake, Windsor on the 15th June 2025, The One for the Planet is a multi-sport event with something for everyone - triathlon, duathlon, aquathlon, aquaswim, run, and swim events.  

Set at the spectacular, flat, and smooth-surfaced Dorney Lake near Windsor, this is one of the UK's most exciting multisport festivals. The event includes an eco shopping village, food and drink stands, and a DJ. Spectators can enjoy views from the water, boathouse, and the iconic Olympic bridge.  

For the Outdoor Swimmer community we are offering a 20% discount for the first 50 sign ups with the code: OFTPOUTDOORSWIM 

You can do this through taking out a Climategames subscription (from as little as £3.49 per month - less than one coffee!) which will reward you every time you swim with climate impact. 

Plus to celebrate this year’s Earth Month, we are launching UK and US climate projects on Climategames, including wildflower meadows, tree planting and restoring areas impacted by forest fires, so you can also choose to fund projects close to home.