The Old Harry Swim Challenge
20 September 2025 | Back up 21 September 2025
Discover stunning vistas both above and below the water's surface, all while championing conservation in this iconic race.
​
Navigate over sea grass forests and a sanctuary for seahorses, culminating in the renowned chalk stacks.
Opt for the 2.5km challenge swimming off the beach towards Old Harry Rocks, where you'll be picked up by powerboat and brought back to shore.
​
Our commitment to a light ecological footprint means a single registration tent, one convenient bag drop, no onsite sales, and minimal buoy placements—preserving the delicate seagrass ecosystem.
​
Join us in supporting The National Trust's ongoing efforts at this exceptional location. Embrace the adventure while making a positive impact!
​
Knoll Beach, Studland, Dorset BH19 3AH | 20 September 2025 (back up 21/09/25)
The 2.5km Old Harry Swim Challenge
​
You'll swim from the beach, out to Old Harry Rocks, you'll be picked dup by powerboat and taken back to shore. Exhilarating!
​
Wetsuits optional | In water start | Chip timed
Receive a t-shirt and swim cap upon completion.
2 hour cut off | Tidal assisted | 20 September 2025 | Back up 21 September 2025 | Waves between 12:00 -15:00
​
£69
Guided swims
​
​
If you want to explore the rocks themselves, join this guided swim/ scramble around the caves and rapids. This event includes a return powerboat ride to the rocks. You'll need a wetsuit (or shorts and t-shirt) and footwear that you can wear in the water as the rocks can be sharp in places.
​
​
Receive a sew on badge and swim cap on completion. 20 September 2025 | (Back up 21 September 2025 | Various times
