The Swim Oxford team is dedicated in supporting open water swimmers.
We have carefully selected beautiful locations to host these excellent events – which include the Lock to Lock 4K, the Lock to Lock 10K, and the brutal SwimRun.
4K swim
KEY FACTS
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SUNDAY 15 JUNE 2025
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4K DOWNSTREAM RIVER SWIM
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REGISTRATION 6-7am, OX29 4BP
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START 7:30am, Eynsham Lock, Oxfordshire
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FINISH Kings Lock, Oxfordshire
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£78 Non-transferable; see refund policy
An open water downstream swim in the river Thames from Eynsham Lock to Kings Lock.
The river Thames meanders through picturesque landscapes set in these Oxford Universities organic pastures. This is a beautiful stretch of river for an open water swimming event.
We recommend that swimmers are experienced in open water swimming and be able to complete the 4K distance within 2 hours - this is the cutoff. You should be comfortable swimming this distance in water temperatures of 12c-16C.
All skin swimmers need permission - contact us regarding your previous open water swimming experience including distance, temperature and duration. Tow floats are compulsory.
Change of clothes bags
All post-swim bags must be loaded at the start at Eynsham Lock. Bags will be transported to the end of the swim, ready for you to change into. Your body temperature continues to fall for some time after your swim, changing into warm clothes is a compulsory requirement.
Shuttle bus
For transport back to you car, please purchase a shuttle bus ticket at registration or online with your entry, including family and friends.
Any questions?
Check out our FAQs page.
Refunds
Ensure you have looked at the refund policy
KEY FACTS
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3 AUGUST 2025
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10K DOWNSTREAM RIVER SWIM
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REGISTRATION 6-7am OX2 9NS
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START 7.30am, Farmoor, Oxfordshire
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FINISH Godstow Lock, Oxfordshire
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£120 Non-transferable; see refund policy
Following the beautiful, meandering river Thames from Farmoor to Godstow, this 10K swim includes three locks with feed stations at each.
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First exit after 2k at Pink Hill Lock.
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At 4k exit is Eynsham Lock.
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Eynsham to Kings lock, is another 4K.
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The final 2K swim to the finish at Godstow.
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Celebrate your finish in the Swim Oxford Cafe/tent
Swimmers must be experienced in open water swimming and be able to complete the 10K distance within 4hrs 30min - this is the cutoff. You should be comfortable swimming this distance in water temperatures of 12c-16C.
Wetsuits are mandatory. All skin swimmers need permission - contact us regarding your previous open water swimming experience including distance, temperature and duration. Tow floats are compulsory.
Change of clothes bags
All post-swim bags must be loaded at the start at Farmoor. Bags will be transported to the end of the swim, ready for you to change into. Your body temperature continues to fall for some time after your swim, changing into warm clothes is a compulsory requirement.
Parking /Shuttle bus
There is ample parking at Farmoor Reservoir (OX2 9NS).A shuttle bus will then take you from the car park a short way to the swim start. For transport back to you car, please purchase a shuttle bus ticket at registration or online with your entry, including family and friends.
Any questions?
Check out our FAQs page.
Cancellation by you
Ensure you have looked at the refund policy
20K swimrun
KEY FACTS
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Not running in 2025
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3.8k swim, 16.5k run
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REGISTRATION 6am OX29 4BP
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START 7.30am, Eynsham Lock, Oxfordshire
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FINISH Wytham Chalet, Oxfordshire
The river Thames sets the scene for the swimming sections, starting at Eynsham Lock.
The running sections are woodland tracks, cross-country style, set in the semi-ancient Oxford University woodlands of Wytham.
Please check the map below for swim and run distances.
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3 X RUN
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3 X SWIM
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Total 20K distance.
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3 feed stations with water and isotonic drinks.
Any additional nutritional requirements is your responsibility.
Swim Oxford Café/tent for post race celebrations included.
Race event merchandise available for sale.
Change of clothes bags
All post-swim bags must be loaded at the start at Eynsham Lock. Bags will be transported to the chalet/café tent in Wytham Woods at the end of the swim, ready for you to change into. Your body temperature continues to fall for some time after your swim, changing into warm clothes is a compulsory requirement.
Parking
There is ample parking at Siemens car park (OX29 4BP) Wharf Road, Eynsham, Oxfordshire.
Any questions?
Check out our FAQs page.
Cancellation by you
Ensure you have looked at the refund policy
Cakes for afters
Post swim celebration from the legendary Swim Oxford Cafe.
Unmatched, unrivalled, unbelievable.
Wild swim celebrations.
"This is too good to be true”
