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.
Enter the 5km for a swim out to Old Harry Rocks, before turning back to shore.
Enter the 2.5km challenge which involves a swim from the beach to Old Harry Rocks, where you'll be extracted by powerboat for an exhilarating ride back to shore to wrap up your mega day!
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)
Recieve a finisher's t-shirt on completion
A TWSCO swim cap to wear on the day
Qualified beach lifeguards along the route
2.5km swimmers get a powerboat ride back to shore
Save time on the day and check in online
Pay on the day, National Trust operated
We don't allow u16 entries
Swim in one wave from Knoll Beach to Old Harry Rocks and back in this unique race.
Wetsuits optional | In water start | Gun timed
Receive a finishers tee and swim cap upon completion.
3 hour cut off | 20 September 2025 | Back up 21/09/2025 | Time 11:30
Swim in waves from Knoll Beach to the infamous Old Harry Rocks in this unique event.
You'll be powerboated back from Old Harry follwing your swim.
Wetsuits optional | In water start | Gun timed
Receive a finishers tee and swim cap upon completion.
2 hour cut off | Tidal assisted | 20 September 2025 | Back up 21 September 2025 | Waves between 11:45 - 15:00
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.
Recieve a sew on badge and swim cap on completion. 20 September 2025 | (Back up 21 September 2025 | Leaving shore between 4pm & 5pm (TBC)
The Wild Adventure Co. delivers activity holidays in beautiful locations, designed around adventure, great food, and peace of mind.
We offer walking, swimming, paddle boarding, and kayaking, all led by experienced local guides with deep knowledge of the places we explore. Our safety-led approach means that travellers can relax and enjoy every moment.
Each stay is completed by fresh, delicious meals prepared by private chefs — bringing everyone together after days spent outdoors.
