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The Manvers Endurance Swim
EVENT CANCELLED
Manvers Water Quality (30/8/26)
Following our earlier updates regarding blue-green algae at Manvers Lake, we wanted to let you know that we have now taken the decision to close the lake to all water-based activities for one week.
Over the last 24 hours, there has been visible evidence of a blue-green algae bloom. Although our regular monthly water-quality monitoring has continued to return its usual excellent results, the visible presence of the algae means we believe a temporary closure is the appropriate course of action.
The closure will apply to all water-based activities, including swimming, paddlesports, dragon boating, sailing, windsurfing, model boating and fishing.
We are also asking all dog walkers to keep dogs out of the lake and away from any visible algae or scum around the water’s edge. Dogs should be kept under close control when walking around the lake and should not be allowed to drink from the lake.
We appreciate that closing the lake will be disappointing and will affect many of our members. However, given the changing situation, we feel that a seven-day closure gives us an appropriate period to monitor the lake, assess conditions and determine the safest way forward.
We will continue to inspect and monitor the lake throughout the week and will provide members with a further update before any decision is made to reopen the water.
The site and café will remain open; it is access to the water and water-based activities that are suspended.
Thank you, as always, for your patience, understanding and support while we manage this situation.
One Lake. Five Hours. Your Distance.
Whether your goal is your very first 400m open water swim, a 5K, 10K, or an ultra-distance challenge, The Manvers Endurance Swim is all about swimming your distance, at your pace.
Unlike traditional events, there are no fixed race distances. Instead, you'll have a five-hour swim window to complete the distance you've set yourself. Swim one lap or twenty - the challenge is entirely personal.
With qualified lifeguards on duty throughout the event and a choice of 400m or 800m lap routes or 80m lengths at the front, you can build your swim to suit your ability, experience and ambition. Whether you're training for a marathon swim, preparing for a triathlon, or simply looking to achieve a new personal milestone, this is your opportunity to challenge yourself in a safe and supportive environment.
Event Schedule
- Registration: 7:00am – 11:00am
- Swim Window: 8:00am – 1:00pm
- Start when you're ready: Enter the water any time between 8:00am and 11:00am
- Finish: All swimmers must be out of the water by 1:00pm
This flexible format allows you to choose a start time that suits you while giving yourself plenty of time to achieve your personal goal.
Swim Course
Choose between:
- 400m loop
- 800m loop
- 80m lengths along the front
Need to stop for a drink, refuel or take a breather? No problem, a rest space near the slipway will enable this.
Essential Kit
Please bring:
- Wetsuit or swim skins (Tow-float mandatory in skins)
- Brightly coloured swim cap
- Your own nutrition and hydration for the duration of your swim
Who is this event for?
The Manvers Endurance Swim is open to swimmers of all abilities
(Junior swimmers must be 8 years old and accompanied in the water by a parent or guardian)
Whether you're:
- Completing your first open water swim
- Building confidence in longer distances
- Training for an Ironman or marathon swim
- Chasing a new personal best
- Looking for a unique endurance challenge
This event is designed around your goal, not ours - One Lake. Five Hours. Your Distance.
Assumed Risk
By booking this swim place: You accept that taking part in Cold Water Swimming is by its nature hazardous and contains certain inherent risks. You accept that you have a duty of care to Manvers Waterfront Boat Club and other swimmers to act responsibly and follow all safety instructions and guidance. Full details will be provided on the booking confirmation.
Please ensure that if you are swimming in other locations that your swimming kit is Clean before entering the lake; this is to ensure Bio-safety in the lake.