Beautiful outdoor heated pool
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250m swim

2km run

Age 11+

Enter GO TRI


750m swim

5km run

Age 15+


Both events welcome paratriathlon entrants.



Photos from previous races. Told you it's a lovely outdoor pool!



Start Lists 

All Start Lists

Entry fee

GO TRI: £20 + race licence fee

CLASH: £25 + race licence fee

Adult race licences cost £5. 

Junior race licences are £1. 

British Triathlon members do not need to pay for a race licence.

  • Chip timing will be supplied

  • All GO TRI applicants must be aged 11 years or older as at 31 December

  • All CLASH entrants must be 15 years or older as at 31 December

  • Withdrawals will be accepted up to one month before the event with refund minus Brit Tri’s fees and cost of day licence as these fees are outside our control. The reason we cannot accept them within the month is because we will have ordered the goodies associated with this place

Race day agenda


CLASH (750m swim, 5km run)


Register: 06h30

Race briefing: 07h20

Race start: 07h30


GO TRI (250m swim, 2km run)


Register: 07h45

Race briefing: 08h20

Race start: 08h30

On arrival at the leisure centre, please follow signs to the registration. Have your name and BTF card (if you have one) ready to show at the desk.

Race briefing will be upstairs at the main cafe.


Race format

Marshalls and signs will be clearly guiding the way around the course.

If you're new to racing, or a little nervous, read our GO TRI section to put you at ease.


  • Heated 50m outdoor pool

  • Swimmers will be started one at a time, at 20 second intervals

  • The swim will ‘zig-zag’ or ‘snake’ up and down the pool lanes

  • Swimmers exit the pool and put on running kit, before taking to the park paths for the run.


  • The course is 2km around Hornfair Park

  • Exit the pool area and head towards your right

  • Run up towards Hornfair Park, keeping to the left

  • Circle the park twice (2 laps)

  • Head up the finish chute

  • Watch a video of the GO TRI run route


  • The course is 5km around Hornfair Park and the flower garden

  • Exit the pool area and head towards your right

  • Run up towards Hornfair Park, keeping to the left

  • Exit the park area towards the left and follow marshals’ instructions towards the flower garden

  • Circle the flower garden as per the route markings and head back towards the park

  • Complete three laps of the the park and flower garden

  • Head up the finish chute

  • Watch a video of the CLASH run route

What do I wear


  • Swimming costume/trunks or a trisuit

  • Goggles

  • Swimcap 



  • T-shirt and shorts / leggings / tracksuit bottoms (if you aren’t wearing a trisuit)

  • Trainers

  • Race belt - safety pins will be made available if you don’t have a race belt

  • Visor/hat and sunglasses if it's sunny

We recommend no wetsuits as this is a pool event and temperatures are generally above 22 degrees. This will be decided on the day so feel free to bring your wetsuit in case it is cool enough to allow a wetsuit swim.

What do I win?

There's something for everyone racing. Our trophies and medals are famous across London. Have a look at this year's prizes.

Where are the results?

We will post them up on the results page once all timings are confirmed. 

Is there coffee?

Yes! It's an early start, so there will be coffee, tea and treats available to buy before, during and after the race.

London League points


This event is part of the VONCRANK, Senior London League. This means you can pick up points individually or as a club and will be awarded at the end of season at the London League Awards!

Events are selected from the region to comprise the 2019 VONCRANK London Senior League, allowing clubs across London to support each others events, compete against each other and generate a healthy environment for improving performance, encouraging participation and having fun.

Travel options


CAR: Less than 10 minutes drive from Greenwich, Woolwich and Blackheath. Free parking is available on surrounding streets. Charlton Lido car park will not be open.


BUS: 89, 178, 422, 380 and 53 run regularly, stopping just outside the club.


RAIL: DLR to Woolwich Arsenal or trains from London Bridge. Then catch one of the above buses.

Citymapper and Google maps will give you up to date options for public transport, traffic conditions and driving routes.

Go Tri


Nervous swimmer?
Not a fan of open water?
Want a supportive and safe event to begin your triathlon journey?


Then this Aquathlon is the perfect event for you!


Taking part at Charlton Lido, a crystal clear, heated 50m outdoor pool, we try to ensure there are fewer than 3 people in a lane at any time.

In the event you’ll swim 5 lengths (250m) where you can stop at each end if you like or hold a side or lane-rope to take a breather.


You’ll enter the water in swim speed order to minimise the likelihood of anyone overtaking you. This will be a beautiful, interference-free swim.

Then, its through transition, which is the area beside the pool where you put on your run kit over your swimsuits. It's a good idea to have a small towel there for a quick dry down, even just for your feet. And finally, you're onto a lovely run/jog/walk around the adjoining park for 2km.


Our team are passionate about getting people to give TRI a try, we’ll support and encourage you in any way that will make you feel most comfortable to give it a go!


Check us out and feel free to chat to us on Twitter or by email




Clash of the Tritons is powered by Triathlon England and is part of the 2019 London Senior League.

Greenwich Tritons are a community triathlon club based in South East London. This is our 11th year running Clash of the Tritons.


This year's race is dedicated to the wonderful Chris Mannion who sadly passed away this year. 


Charlton Lido and Lifestyle Club

Hornfair Park

Shooters Hill Rd

London SE18 4LX

Free parking on the side roads.

No parking on site.


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