Swim London Challenge


Swim London – Swim the distance of a section of the River Thames through London (41miles/66km) and see you position on our interactive map each time you submit!

A great motivator for your swimming! Work towards this award over 12 months and join our swim challenge community!

Complete 41 miles of swimming within 12 months – start any time from 15th April 2022 to 15th April 2023.

View your progress on a map view of the results.

Swimming can be completed in any location, pool or open water, wetsuit or non wetsuit or a combination – the choice is yours.

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If you add a frame it will be sent with your challenge awards when you complete your challenge unless you request otherwise. They can also be found under accessories in the shop. UK addresses only.
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Swim London Challenge Info

Complete 41 miles (66km) of swimming in any location starting any time from from 15th April 2022 and complete within 12 months of your purchase date (last swim date 15th April 2024) - this is the distance of swimming the River Thames from Taggs Island to Erith; virtually swimming through greater London past all the famous landmarks. The faster you complete your distance, the higher your position in the results table! Each time you submit, watch your position move down the Thames on our map - you will even see the landmarks as you pass them!

The distance can be completed in any number of sessions between the official challenge dates. You can swim in a pool or in open water, indoors or outdoors, wetsuits or non-wetsuit - additional accessories such as gloves/boots etc are permitted. Wherever you love to swim!


For successful completion of this Swim London challenge you will receive a commemorative challenge coin, a woven swim badge and a postcard sized completion certificate which will be sent to you by post (postage is free within the UK).

Awards will be sent out within 14 days of you completing your challenge and submitting your final results and clicking 'Challenge Complete' on the submissions form. Please Note: Awards are not guaranteed - they are sent only on successful completion of the challenge and submission of your results by the deadline.

( Live outside the UK? - additional fees are charged for sending full awards outside of the UK, fees may also be charged locally. We have a no-coin option for people outside of the UK to receive only the certificate and badge awards which reduces the challenge cost and local fees and taxes - read more here in the FAQs. )

Recording your results

You must keep a record of all your swim details throughout the challenge period. You can submit on our website after each swim and you will see a list of all your submissions and your current position in the results table. Record the date, swim distance and swim time in hh:mm:ss of each swim.

You can use a fitness watch or tracker such as a Garmin or on a fitness app to measure the distance/time of your swim and then input them on our form. You may also record your swim details manually; at a swim venue they will likely provide you with information such as course/lane distance or you can estimate it using google maps for outdoor venues. These challenges rely on honesty and we expect all entrants to be honest with their own results.

If you join a challenge after the start date, you can submit swims that you completed before you entered if they were completed after the challenge start date and met the conditions/rules of the challenge.

Submissions, Results and Receiving Awards.

You will need to use our online submissions form to inform us of your session details. The form link can be found in your account or on the submissions page (you will only see the submission options if you are logged into your account and have purchased the challenge). Completion of the challenge, submissions and deadlines are your responsibility. We suggest you add the deadlines for this challenge to your calendar.

You should submit results for each swim session you complete for this challenge. You can do this after each session, in batches (eg once per week/month), or all at the end of the challenge. We suggest you submit at least once a month however you can submit any time. The last submissions date is planned to be 30th April 2024 at the earliest but you have 12 months from your start date to complete the challenge.

The results table will be on the submissions page. The results position for the challenge is determined by time. All results are provisional until after the submissions deadline. If you do not complete the challenge distance and submit before the deadline your results will be removed from the results table to allow positions to be shown accurately for completers.

Once you complete your 41 mile distance you cannot submit any more swims. We won't include any swims after the one that completes your challenge distance.

When you complete your challenge and want your awards to be sent to you, you will need to click the 'Challenge Complete' button after your final submission to send them for checking and approval. Your results will be checked and, if approved, your awards will be sent within 14 days. If there are any queries with your results eg duplications etc, we will email you to the email address registered on your account. 

Our challenges are honesty based and require you to accurately and honestly record and submit your own results.


All swimming for this Swim London challenge must be completed between 15th April and 15th April 2024 - to be completed within 12 months of your purchase date or by the 15th April 2024 (whichever is sooner). All results must be submitted online by 30th April 2024 - results submitted after this date will not be included in the results table and the awards will not be sent.

Other Challenges

If you enter other Challenge Co. swim challenges you are permitted to submit your swim details for more than one challenge (so long as the conditions for each of the challenges are met). You can copy swims easily from your submissions log by selecting the submissions you wish to copy then choose the challenge to copy to from the drop down menu.

If you join a challenge after the start date, you can submit swims that you completed before you entered if they were completed after the challenge start date and met the conditions/rules of the challenge.


IMPORTANT - this challenge should only be attempted by those completely confident that they are fit and well enough for the challenge requirements and have suitable equipment and support. We advise you get a medical check before starting the challenge. Please ensure that you are aware of the risks and challenges of swimming in your chosen format and location and take all necessary precautions to make sure you are safe whilst doing this activity. You must observe any local, national or venue specific rules and regulations during your activity. Please ensure that you follow safe swimming practices and have a plan in place for support and safety. All swimming for this challenge is at your own risk.

Please read our Swim Safety guide for tips of how to make sure you are safe whilst cycling.


See our FAQs on the INFO page.

Submissions & Results

If you complete this challenge in multiple sessions you should submit the results of each session. You can do this after each session, in batches (eg once per week), or all at the end of the challenge. Submitting by the deadline is your responsibility.

Results can be seen on the submissions page.

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