The Big Chill 25
Next dates
25 Hour Team Relay
The Big Chill 25 is a unique 25-hour team swimming challenge, running from midday on Saturday 24 October to midday on Sunday 25 October. As the clocks go back overnight, this event becomes a true 25-hour endurance experience.
Delivered in collaboration with the NHS, this event brings together teamwork, resilience, and cold-water swimming for a memorable challenge.
Event Details
Date: Saturday 24 October – Sunday 25 October
Time: Midday to Midday (25 hours)
Age: 18+ only
Teams & Entry
Teams of 4-8 swimmers
Smaller teams may be considered in special circumstances
Registration fee: £36 per participant
Fundraising pledge: £200 per participant
Each participant will receive an exclusive Big Chill 25 bobble hat to help keep warm throughout the event.
Teams & Entry
Teams of 4–8 swimmers
Smaller teams may be considered in special circumstances
Registration fee: £36 per participant
Fundraising pledge: £200 per participant
Each participant will receive an exclusive Big Chill 25 bobble hat to help keep warm throughout the event.
How It Works
One swimmer from each team swims every hour, on the hour
The relay runs continuously from midday to midday
Swimmers rotate hourly unless unable to complete their slot due to fatigue or injury
All swimmers should be ready 10 minutes before their allocated time
Each team must appoint a team manager to coordinate transitions
A relay band (baton) must be passed between swimmers and remain in the pool at all times
Conditions
Pool temperature: 12-15°C
Please ensure you are familiar with our Cold Water Swimming Terms & Conditions before taking part
Safety & Kit Guidance
Brightly coloured swim hats are mandatory
Wetsuits are strongly advised
Wetsuit gloves and booties are recommended
Warm clothing (including bobble hats) is encouraged for between swims
Facilities & Camping
Camping available in a designated area for teams
Camper vans permitted in the main car park (£30 fee)
Full Lido facilities will remain open throughout the event
The café will act as a designated warm space for participants
Event is managed by with Cheltenham Lido Ltd in partnership with the NHS (SPL Registered charity #1052203). Create your own fundraising page justgiving.com/charity/spl. All just giving proceeds and profits will be shared equally between the Cheltenham Lido and NHS Charities
