An Open Water Adventure
An open water adventure at Alton water in Suffolk
New 10km swim added for 2024
SwimAlton is our season opener. The first opportunity to go open water swimming with us.
We've created an exciting and interesting course we're sure you'll love.
Alton Water: Ipswich, Suffolk
Distances: 1/2 Mile, 1 Mile, 2 Miles, 5km
NEW 10km for 2024
Start time: From 7:00am
Cut Off: 11:00am
Entry fee: From £25.00
SwimAlton Finisher Medal
Silicone swim hat
Advanced medical support
Comprehensive safety cover
Free event photos
Swim float hire
The course is an adventure around the heart of Alton water in Suffolk. A beach start leading to a long exposed reach across the widest section of the reservoir. We incorporate the water tower and the Dam before turning back and heading to a beach finish and a warm welcome.
The course is full of features and points of interest. We welcome swimmers to challenge themselves with pace or distance offering a nice range of options. 1/2 mile, 1 mile, 2 miles or 5km swims are open to athletes.
Early Bird Entry Prices
SwimAlton 1/2 Mile
The perfect place to start - £25
An out and back, keeping things close to the shore. Great for building your confidence in open water.
SwimAlton 1 Mile
An adventure for everyone - £38
A complete loop of the SwimAlton course. With some fantastic landmarks along the way.
SwimAlton 2 Miles
The adventure doubled - £42
Enjoy the course and increase the distance. You get to enjoy the course twice and challenge your endurance.
Open water Half Marathon - £48
A huge benchmark in open water swimming, considered the Half Marathon. 3hrs to try!
Open water Marathon - £65
A huge benchmark in open water swimming, 4 hours to complete your 10km swim supported by SwimAlton throughout!
Please note the temperature ranges before entering the event.
15.9c and under = Wetsuit compulsory
16c and above = Wetsuit optional in all distances
23c = Advisory Non-wetsuit for 2 miles
24c = Advisory Non-wetsuit for 5km
If the water temperature does not reach 16c, this will be a wetsuit compulsory event. Please consider this when entering. There will be no transfers or refunds made because of the wetsuit policy.
The upper limit is discretional. We advise that you don't wear a wetsuit above these temperatures but acknowledge not everyone is here to swim as fast as possible and might require the extra warmth.
The policy has been agreed with the lake owners using industry best practice and our collective knowledge of the venue. Temperatures will be adhered to; no exceptions will be made. Unfortunately, we cannot make additional allowances for experience or preference. We appreciate your continued understanding.
Swim floats are compulsory for this event
They are designed to make you visible without impeding your natural swimming stroke.
We loan our swim floats for free to all competitors. No need to book, no need to make any arrangements.
They will be ready to collect on the morning of SwimAlton if you would like to use one.
We believe that they offer our swimmers the best possible safety during our event.
How to Find Us
Event parking is located in the overflow car park on the entrance to the site. *Anglian Water parking charges apply
Alton Water Reservoir
Follow event signs from the access road where our team will on site to assist with parking safely.
The swim site is a small walk down the hill from the parking area.
Please note; we might be more difficult to contact during race week.
Mark all urgent enquiries with URGENT SwimAlton in the title and we will get back to you as soon as possible.