Dart 10k

The first, and arguably finest, 10k swim out there!




The Dart 10k was the first, and is arguably the finest, 10k swim on the open water calendar, growing from 200 to 1600 swimmers a year over ten years. The course of the Dart 10K is a unique journey punctuated by landmarks such as the Cormorant Tree, the white rock, Sharpham boathouse and Bow Creek. It’s supported by volunteers from the local and swimming community, who make it one of the most special events in the swimming calendar. It’s a journey, not a race – we have some fast swimmers, skins swimmers, disabled swimmers, newbies, butterfly swimmers, leisurely swimmers – whatever the level, there’s room for everyone in the river.

Find out more about the event in the 2019 event report and gallery.


The  Dart 10k will take place on Saturday the 11th and Sunday the 12th of September 2021. The swim starts around high tide, which in 2021 means swimmers will enter the water from 9 am on Saturday and 9.30 am on Sunday. 

Registration packs will be sent by post, but you will still need to leave time to register before your swim – detailed event timings will be shared with swimmers in the event information pack, around 2 months before the event. 

DART10K 2020

The Dart 10k has been cancelled in 2020 due to Coronavirus. Information on this cancellation can be found here. If you have a Seasonaire ticket (a ticket for all 2020 events) our latest update can be found here.

All 2020 tickets for the Dart 10k have automatically been carried over to the 2021 event, unless a refund was applied for. The refund window is now closed, but the free transfer window is open until 31st October 2020 the recipient of a ticket transfer can confirm the transfer here. The ticket transfer window will reopen in the 1st December 2020, as long as tickets are sold out, until the 1st August 2021, with ticket transfers incurring a £20 admin fee.


The swim is assisted by river flow, but swimmers should still train to swim 10km. All swimmers will need to be acclimatised to outdoor swim temperatures by the day, and to have experience of chop and open water. 


We have worked with a remarkable professional water safety team for over 10 years, who deliver the best water safety and support at all our events. Swimmers are flanked by professionally qualified employed lifeguards throughout the swim. There are two feeding stations on the route with drinks, bananas, flapjacks and jelly babies, at around 4 km and 7 km from the swim start.


We welcome skins and suits swimmers at our events, but Skin Swimmer Passes must be applied for and are not guaranteed. All tickets are sold on the basis that participants will wear full length swimming wetsuits or full length sleeveless wetsuit. 

WETSUITS: Your wetsuit must, at least, cover you from shoulders to below the knee, be made of neoprene and be designed for swimming / triathlon / swim-run (i.e. not scuba diving or surfing). Surf wetsuits do not offer the same mobility or buoyancy balance as swim wetsuits, which leads to physical issues completing longer swims. 

SKIN SWIMMER PASS: Skin Swimmers Passes are awarded on the basis of suitable experience and must be applied for by the 25th July 2021 using this form. Once granted, the pass is valid for all 2021 OSS events. Applications are vetted by the Events Managers and decisions are non-negotiable. If you filled in the skins swimmer application prior to 2020 events we ask that you fill it in again to provide your most up to date experience. 

Swimmers who completed a 2019 event with The Outdoor Swimming Society in skins will automatically be granted a 2021 Skins Swimmer Pass. 

If you are fairly new to skins swimming, but think you’ll want to swim the event  without a wetsuit please fill in the Skins Swimmer Pass application form nearer to the deadline so you can provide the experience you have had to date, rather than what you expect to do.  If you don’t get a pass and don’t want to swim in a wetsuit you can transfer your ticket to a friend. Cut off for ticket transfers for the Dart 10k is 1st August 2021, one week after the Skins Swimmer Pass application deadline. 

Jess Rose


Most people swim our events using front crawl, but we do have swimmers that do butterfly and breaststroke. Breaststroke is not generally recommended because it’s hard on the knees to swim this distance in a wetsuit. If you are planning to do this swim fly, please let us know – We would love to follow your journey! 


We welcome and can aim to accommodate all swimmers with additional needs who would like to swim as much as we can. It is essential that those with additional needs, or anyone who has concerns about their ability to take part in this event, seek their doctor’s advice before taking part, and please contact us email the event manager prior to buying a ticket or as soon as possible once you have a ticket, to discuss how we can accommodate you. Swimmers with additional needs will be accommodated within the existing water safety provision wherever reasonable adjustments are possible (no separate arrangements can be made), and will need to attend an additional safety briefing prior to the swim.


Events run by The Outdoor Swimming Society are tow-float free. We have ample safety cover who watch swimmers via their brightly coloured hats. Tow floats makes sighting swimmers more difficult by doubling the number of brightly coloured objects in the water, and may entangle other swimmers. It is sometimes stated that tow floats make retrieving an unconscious swimmer easier, however tow floats are not tested or rated to act as a safety device in this way. Snorkels and fins are not permitted as the hard edges risk injuring other swimmers at the swim start in particular.

There are two feeding stations at around 4km and 7km downriver from the swim start, where you can top up on water and energy. These stations carry water, bananas, jelly babies and flapjack. Most swimmers with personal medication tuck it up the sleeve of their wetsuit – however, if this doesn’t cover your needs and you want to use a tow float for this purpose please contact the event manager.

Jess Rose
Jess Rose
Jess Rose


There are a range of food stalls at the start of the swim in Totnes and at the swim finish on the village green at Dittisham (the Dittisham Ham). Food and entertainment on the Ham is available throughout the day for supporters and swimmers, and with deck chairs available to admire the view, supporters can anticipate the arrival of swimmers in comfort.

This is an A to B swim, starting at Longmarsh Green in Totnes and finishing at Dittisham Ham. We offer coaches to spectators (with prepaid tickets) as well as swimmers (free, prebooking not required) to enable car free weekends.

If you are bringing a car your choices are to park at Totnes, the event start, and then take a coach back to the start after your swim, or to park at Cott Farm in Dittisham, near the event finish and take a coach up to the start before your swim. 

Please note Devon roads are windy and slow, and the carpark at Cott Farm, Dittisham is a steep 800m walk from the event finish on the Ham. Coaches drop closer to the finish in Dittisham, which may make parking in Totnes a preferable choice if you (or your supporters) don’t fancy the steep 800m walk. 

There is very limited disabled parking at the Dittisham Ham but it is not possible for event traffic other than these ticket holders to enter the village for drop offs – if you need a disabled car pass please contact us

Graham Wynne


Our events are run, on land, by a huge and fantastic army of volunteers. If you or your supporters would like to join the #OSSteam for event day or a day around the event, please read this Dart 10k volunteering factsheet.

#OSSteam places for the Dart 10k can be on a volunteer only basis, or half price tickets are available for people who would like to swim one day and volunteer on the other. Whether you decide to swim or not,  #OSSteam members will receive a free T-shirt, free parking during the event, a discount on Dart 10k 2021 event merchandise, early-bird access to 2022 tickets for all OSS events, and a whole lot of love from The Outdoor Swimming Society Events team and swimmers as they make this swim possible for others.

Tim Bridges


We will do everything we can to run the 2021 events. As part of event preparation for 2021 our event team will undertake planning of all aspects of the event to make sure they are Covid-19 secure and can meet changing circumstances.

We will communicate all information to you by email: this year more than any, please save noreply@outdoorswimmingsociety.com to your address book to ensure you receive and read event communications. An Event Information Pack will be issued to all participants 2 months prior to the event and will include any special measures we are taking.

Please be aware we can only run events if all WHO and UK Government guidelines in place at the time of the event can be met, and the event is supported by local councils and event stakeholders. If the event is unable to run due to a local lockdown or change in national or local circumstances due to Covid-19, we will do our best to provide a suitable alternative to the event (at a different venue or on a different weekend), but this may not be possible. One foreseeable scenario is that we have to restrict spectators to reduce social transmission, increase the ability to physically distance entrants, and to enable effective tracking and tracing. We advise you to check the terms and conditions of associated bookings such as accommodation and travel so you are fully aware of their cancellation policy if changes to the event do happen.

Whatever changes are introduced, we hope to deliver the same feel-good events as ever.


After the statutory 14 day cooling off period, tickets cannot be refunded or deferred. 

If you know you will not be able to attend the event:

We realise that situations change and you might get injured, change jobs, or get invited to your best friend’s wedding. As your entry is NON refundable we suggest you consider taking out insurance to cover any costs you incur if you are not able to attend the event. Please check the conditions of your policy carefully to make sure it provides the cover you require.

You may be able to transfer your ticket to another swimmer. The free transfer window is open now and will run until midnight on the 31st October 2020. The second ticket transfer window will open on the 1st December 2020, on the condition that tickets for the event have sold out, and stay open until the 1st August 2021.  Transfers in the second transfer window will incur a £20 admin fee. If tickets do not sell out, transfers in the second transfer window will not be offered.

You will need to find a recipient for your ticket (we recommend advertising you ticket on the Dart10k event Facebook page) and you will need to arrange for the transfer of payment for the ticket between yourselves. You are responsible for making sure the recipient is aware of all of the terms of the ticket, including any fundraising or volunteer commitments included within the ticket. 

The recipient of the transfer should visit the Dart 10k ticket page and choose “Dart 10k 2021 ticket transfer”. After the 1st August 2021 your ticket is yours to keep and no transfers are possible. 

If the event is cancelled by The Outdoor Swimming Society:

No refunds are given if we have to cancel or curtail the event due to adverse weather, pollution, government orders or other factors outside of our control.

The OSS has a robust attitude to both safety and risk and works with an extremely professional water safety crew to ensure that the event will run if it is safe to do so. In the unlikely event we have to cancel on the event day or immediately before the event due to, for example, storms, lightning, or heavy rain that impedes the view of the safety team then you will not be offered a refund or a deferred entry to the next year’s event. At this point, everything will be in place for the event to take place and most, if not all, event expenses will have been incurred.

The OSS does not hold cancellation insurance to cover this eventuality as insurance of this nature is extremely expensive and would not cover all costs incurred by the event. 

Please see our Event Terms and Conditions for more information.


Swimmers are free to raise money for any charity (or none), and we are delighted to partner with Level Water once again as our primary event partner charity.

Level Water is a young and fast growing charity whose fortunes were changed overnight by involvement in the Dart 10k. The charity provides one-to-one swimming lessons for disabled children across the country, teaching them the basics then help them to join mainstream lessons and competitive clubs.

To help support its work, The Outdoor Swimming Society receives funds from sales of tickets for branded OSS events and merchandise. Every purchase you make supports the running of the society, which is a not-for-profit organisation in it’s self defined role as the UK’s (and the world’s)  best inspirer and informer on the art and sport of swimming.

A huge thank you for the continued support of our sponsors:


Thank you for the continued support of our supporters: Dittisham Parish Council, Dittisham Sailing Club, South Hams District Council, Dart Harbour Authority, John and Sean Tucker at Cott Farm, the Dart Rowing Club and Exeter Canoe Club, for their continued support of the Dart 10k.