Walden Triathlon 2025

Walden Triathlon (WT25) is an early-season Sprint and Super Sprint event ideal for athletes of all abilities.

Download the race instructions

Sunday, May 4th, 2025

@ Lord Butler Leisure Centre

Our friendly, back-to-basics event is suitable for both novices and seasoned competitors. It's a local race with a fantastic atmosphere! 

Choose Your Challenge

Sprint Distance

Dive into the action with a pool swim, cycle through the charming Essex villages, and run to glory! Perfect for those looking to push their limits.

  • Swim: 400m indoor pool swim at the Lord Butler Leisure Centre

  • Bike: 23km through picturesque Essex villages

  • Run: 5km mixed terrain run

Super Sprint

At half the distance, this option is perfect for beginners or those looking for a quicker challenge.

  • Swim: 200m indoor pool swim

  • Bike: 12km through idyllic landscapes

  • Run: 2.5km mixed terrain run

Walden Triathlon (WT25)

We've worked hard and listened to our fellow triathletes - we've kept our cost of entry low and will be considering our environmental impact when organising, setting up and running our event. There will be no goodie bags, but every finisher will receive a medal made from recyclable material and there will be a sustainable prize for 1st place in the following categories:

  • Sprint: Open / Female / Vet Open / Vet Female / Super Vet Open / Super Vet Female

  • Super Sprint: Open / Female 

  • Relay: Open / Female / Mixed

  • Club: Combined score taking into account number of participants and individual ranking

 If you are a Para triathlete and want to join our event, please email events@waldentri.co.uk and we’ll work with you to ensure we are supporting your race experience with us.

We're really looking forward to you joining us for our 25th Walden Triathlon (WT25) event.

Support MS-UK

Multiple sclerosis (MS) is a condition affecting the brain and spinal cord, with symptoms like fatigue, pain, sensory issues, cognitive difficulties, and problems with speech, swallowing, and mobility. There is currently no cure.

MS-UK, a national charity founded in 1993, supports over 150,000 people in the UK living with MS, empowering them to lead healthier, happier lives through understanding and tailored support.

MS-UK holds a special place in the hearts of WaldenTri members, particularly Clare Thompson, a founder and former head coach. Clare’s sister, Juliet, was diagnosed with MS 14 years ago, and MS-UK has provided vital support during challenging times. Clare has inspired others to join the cause, coaching members like Katie, Suzie, and Florence, who are competing in the WT25 as the MS-UK Relay Team and running the London Marathon to raise funds. Each has personal connections to MS—whether through family, friends, or their professional lives—and is passionate about making a difference.

Join us in supporting MS-UK and the incredible work they do for those affected by MS.

  • Pool Swim

    Based at Lord Butler Leisure Centre, before heading out on the next leg of the triathlon

  • Cycle

    On our local, picturesque country roads

  • Off-road run

    The course is always well supported by our legendary friendly marshalls.

Our thanks to our race sponsors

What competitors say…

“I just wanted to say thank you so much, I've just got back from the WaldenTRI and I had such a great time yet again! Everyone was so lovely and the atmosphere was amazing.”

– Competitor WT21

Challenge Yourself in the Heart of Essex!

Swim, Bike, and Run in one of the UK's most scenic settings. Join us for an unforgettable day of fitness, fun, and community spirit.