The Event

The event established itself as one of the toughest endurance challenges in the UK, covering 1,000km between Loch Ness and London across 3 disciplines.


The Monsterreturns

The Monster Triathlon returns in June 2025 to welcome a new class of participants, guaranteeing breath-taking scenery and iconic challenges across the UK. Comprising of a 5km swim in Loch Ness before 5 days of cycling and finishing with a 50k ultra-marathon into London, the Monster Triathlon will challenge you like never before.

With a range of packages available for the full triathlon, as well as swim and run only packages for those wanting to tackle just one leg of the challenge, there is a Monster event for everyone.

Places are limited on this unique event so register now to avoid disappointment.


Included inthe event

Across the 7 days of your challenge, you can expect the highest level of support from our team including:

  • Hotel accommodation on a twin-basis, including secure bike storage
  • Breakfast, lunch and dinner each day as well as snack stops
  • Baggage Transfer
  • Finisher medal and T-shirt
  • Full medical support
  • Full mechanical support
  • Pre-event pack including GPX files and briefing notes
  • Sports physio and massage (supplement)
  • Finish celebration including food & drink

The RouteSwim.Cycle.Run

Day 15km swim in Loch Ness (Cycle to Fort William)

Starting on the shores of the fabled Loch Ness, home to a mythical monster, you’ll begin your challenge by braving the waters with a 5km swim before tackling a short ride to Fort William, home of the UK’s tallest mountain, Ben Nevis.

Day 2Cycle from Fort William to Glasgow

Day 2, and the first full day on the bike, will see you tackle both the climbs of the Scottish Highlands, including the iconic Glencoe Pass, and the twisting lanes on the shores of Loch Lomond, before reaching Glasgow and the day’s finish.

Day 3Cycle from Glasgow to Carlisle

Following the rugged landscape, you’ll cut through the Scottish Borders as you head south towards England taking in yet more incredible scenery as you take on the next leg of your challenge.

Day 4Cycle from Carlisle to Haydock

The halfway point in your challenge sees you take on the longest day on the bike as you head over the incredible Shap Pass and through the undulating terrain of the Lancashire countryside.

Day 5Cycle from Haydock to Kidderminster

As your challenge starts to take its toll, you’ll face a fast and flat start to the day, but keep some energy in the bank as you tackle the hills of the West Midlands towards the end of the day’s ride.

Day 6Cycle from Kidderminster to Windsor

Your last day in the saddle sees you tackle another long day, passing through Shakespeare’s country and the beautiful Warwickshire countryside. You’ll battle your final hills of the trip through the Chilterns before descending down into Windsor.

Day 7Run from Windsor to Richmond

The final leg of your journey, and an ultra-marathon to complete as you join an impressive list of Monsters who have taken on the challenge of the UK’s toughest triathlon. Following much of the Thames Path as it winds its way into the capital, you’re within touching distance of your goal and the embrace of your fellow Monster finishers.
David Lawrie
Lisa Melvin
"Bucket List event! A once in a lifetime opportunity. Just the best experience ever, swimming in Loch Ness with the most dramatic backdrop, jumping onto our bikes for an epic 5 days of cycling through the rolling British countryside topped off with the most beautiful run along the Thames. The Monster Team were truly outstanding from the outset making sure we were all very well looked after and making it a very chilled out event allowing all participants to enjoy the week at a pace to suit them meeting great new friends at the same time.  Highly recommend!! "
Vicky Goodwin
Roman Janda
"Best event of my life so far. If you need a challenge this is the one..."
Aubrey Malcolm Green
Andy Pills
"Thank you for the best week I’ve had in a long long time. Hard at times but a really great team!"
Aubrey Malcolm Green
Jacqui Burke
"Fantastic event. It was hard work, well worth it. Organisers were amazing. View of Scotland and England were stunning. Great to meet loads of new like-minded friends."
Aubrey Malcolm Green
Paul Naylor
"Definite bucket list, must do! Awesome event, well organised and an incredible journey. All the team were first class and couldn't do more to help."