Triathlon events calendar

Triathlon events calendar

Swim, bike, run: the classic multi-sport challenge!

191

Triathlons in the UK

Triathlon events combine swimming, cycling and running in that order with a huge range of events with total distances from under 15 km to over 300 miles! Select your location to find triathlons in your area, read more about the distances below or scroll down for the UK's biggest events.

Search by month

Search by place

Map view

Triathlon distances

Find out more about common triathlon event distances below to help find your perfect event!

Novice triathlons

Novice triathlons

Take on your first triathlon in one of these short events designed for beginners.

Triathlons for beginners
Super sprint triathlons

Super sprint triathlons

Short events usually involving a 400m swim, 10km bike and 2.5km run.

Super sprints
Sprint triathlons

Sprint triathlons

Ideal for beginners usually involving a 750m swim, 20km bike and 5km run.

Sprint triathlons
Olympic triathlons

Olympic triathlons

Also known as standard triathlons and usually involving a 1500m swim, 40km bike and 10km run.

Standard distance
Half Ironman

Half Ironman

Involving a 1.2 mile swim, a 56 mile bike and 13.1 mile run, these are also known as 70.3 or middle distance triathlons.

Middle distance
Ironman triathlons

Ironman triathlons

Involving a 2.4 mile swim, a 112 mile bike and 26.2 mile run, these are also known as Iron or full distance triathlons.

Full distance
Relay triathlons

Relay triathlons

Experience the triathlon buzz without having to do each leg.

Relay triathlons
Kids triathlons

Kids triathlons

Find an event for your kids using our advanced search with age filter.

Kids triathlons

Triathlons in 2025

Featured events are listed below - select a month/region or the map view to see all events.

Eton Dorney Triathlons
Olympic venue

Eton Dorney Triathlons

Feel like an Olympian this September as you race traffic-free in the idyllic grounds with smooth tarmac & crystal clear lake.

Take a look
A family-friendly event in partnership with the Brownlee Foundation, for triathletes of all skill levels including a Sprint, Standard, Middle distance tri, Swims, Aquabike, Relay and Juniors.
  • Sat 12 - Sun 13 Jul
  • £20-£95
Ripon, North Yorkshire, UK

Ripon Triathlon Festival

A family-friendly event in partnership with the Brownlee Foundation, for triathletes of all skill levels including a Sprint, Standard, Middle distance tri, Swims, Aquabike, Relay and Juniors.

  • Lake swim 4
  • Sprint triathlon
  • Sprint aquabike
  • Standard aquabike
  • Olympic triathlon
  • + 5 more races
  • Families
  • Newcomers
  • Dogs allowed
  • Event village
  • Urban
  • Rural
  • Free venue entry
  • Age 8 & over
  • Events
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Sun 13 Jul
  • £58-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | July

Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
  • Recycling
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Events
A jewel in the castle crown! Get active in the beautiful grounds and surrounding area of stunning Leicestershire in the discipline of your choice! Celebrate in the festival village afterwards.
  • Sat 19 - Sun 20 Jul
  • £35-£295
Grantham, Leicestershire, UK

Belvoir Castle Triathlon and Multisport Festival

A jewel in the castle crown! Get active in the beautiful grounds and surrounding area of stunning Leicestershire in the discipline of your choice! Celebrate in the festival village afterwards.

  • Kids triathlon 4
  • Super sprint triathlon
  • Sprint triathlon 2
  • Olympic triathlon
  • Half Ironman
  • + 14 more races
  • Families
  • Newcomers
  • Event village
  • Rural
  • Age 9 & over
  • Events
Swim, bike, run your way from Windsor Castle to Brighton on this unique, non-competitive, point-to-point adventure through the North & South Downs. Fully way-marked (no navigation) and full support.
  • Sat 19 Jul
  • £265-£295
Windsor, Buckinghamshire, UK

Castle To Coast Triathlon

Swim, bike, run your way from Windsor Castle to Brighton on this unique, non-competitive, point-to-point adventure through the North & South Downs. Fully way-marked (no navigation) and full support.

  • 1.2 miles lake swimming
  • 67 miles road cycling + 3550 ft ascent
  • 14 miles trail running + 1512 ft ascent
Entries close tomorrow
An amazing celebration weekend of swim-bike-run using the magnificent Marine Lake with the glorious Victorian Clevedon Pier as the backdrop, sea views, promenade and top reviews!
  • Sun 20 Jul
  • £55
  • Entries close tomorrow
Clevedon, Somerset, UK

Clevedon Triathlon

An amazing celebration weekend of swim-bike-run using the magnificent Marine Lake with the glorious Victorian Clevedon Pier as the backdrop, sea views, promenade and top reviews!

  • 750 m lake swimming
  • 20 km road cycling + 246 m ascent
  • 5 km multi terrain running + 111 m ascent
  • Newcomers
  • Chip timing
  • Enter online
  • Event village
  • Coast
  • Age 14 & over
  • Sprint triathlons
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Sun 27 Jul
  • FREE-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | July

Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Events
Awarded the Event of the Year (2021) in the Welsh Triathlon Awards, The Craft Snowman is well known as the toughest multi-terrain triathlon and duathlon in the UK. Plus swims and trail running events.
  • Sat 2 - Sun 3 Aug
  • £31.99-£249.99
Betws-y-Coed, Clwyd, UK

Craft Snowman Triathlon & Duathlon, Snowman Swim & Ogwen Yr Helgi Du Trail Runs

Awarded the Event of the Year (2021) in the Welsh Triathlon Awards, The Craft Snowman is well known as the toughest multi-terrain triathlon and duathlon in the UK. Plus swims and trail running events.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Sprint duathlon
  • 10K run
  • + 5 more races
  • Trees not tees
  • Recycling
  • Newcomers
  • Plastic bottle free
  • Music
  • Event village
  • Event expo
  • Rural
  • Mountains
  • Free venue entry
  • Sustainability policy
  • Public transport links
  • Plastic-free event
  • Age 15 & over
  • Events
Start your triathlon journey with Bishopton Lake, home of the North East Wake Park. This venue offers a great opportunity for beginners to test their grit...
  • Sun 3 Aug
  • £45-£80
Stockton-on-Tees, County Durham, UK

Bishopton Triathlon

Start your triathlon journey with Bishopton Lake, home of the North East Wake Park. This venue offers a great opportunity for beginners to test their grit...

  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
  • Sprint aquathlon
  • + 1 more race
  • Newcomers
  • Event village
  • Park
  • Age 18 & over
  • Events
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Sat 9 Aug
  • £40-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | August

Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
  • + 1 more race
  • Recycling
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Events
Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.
  • Sun 10 Aug
  • £58-£120
Saint Neots, Cambridgeshire, UK

ATW St Neots Triathlon | Race 3

Stunning riverside venue! Swim in the beautiful River Ouse, cycle through scenic villages and run around Riverside Park in a triathlon or aquabike event of your choice.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Standard aquabike
  • Sprint aquabike
  • Newcomers
  • Event village
  • Park
  • Age 15 & over
  • Events
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.
  • Sun 17 Aug
  • £58-£99
Peterborough, Northamptonshire, UK

ATW Oundle Triathlon

ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Triathlon! It doesn’t matter if you are an experienced triathlete or this is your very first attempt at swim-bike-run.

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Newcomers
  • Event village
  • Age 15 & over
  • Events
ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.
  • Sun 17 Aug
  • £21-£29
Oundle, Northamptonshire, UK

ATW Oundle Children’s Triathlon

ATW is the largest triathlon organiser in the UK and is bringing you the Oundle Childrens Triathlon! Ideal for all levels including very first attempts at triathlon.

  • Kids triathlon 5
  • Families
  • Newcomers
  • Event village
  • Age 8-16
  • Triathlons
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Wed 27 Aug
  • £58-£78
Windsor, Buckinghamshire, UK

Midweek Dorney Triathlon | August

Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

  • Super sprint triathlon
  • Sprint triathlon
  • Sprint aquabike
  • Recycling
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Events
Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.
  • Sun 31 Aug
  • £68-£250
Lifton, Devon, UK

Roadford Lake Triathlon Autumn

Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Ironman
  • Families
  • Trees not tees
  • Recycling
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Triathlons
This is a great race for all standards, from the absolute beginner right through to the seasoned triathlete. The course is fast, flat and has great PB potential.
  • Sun 31 Aug
  • £44-£49
Hatfield, Hertfordshire, UK

HSV Sprint Triathlon & Aquabike

This is a great race for all standards, from the absolute beginner right through to the seasoned triathlete. The course is fast, flat and has great PB potential.

  • Sprint triathlon
  • Sprint aquabike
  • Newcomers
  • Event village
  • Urban
  • Age 15 & over
  • Events
Face up to the mountain in one of Europe's most inspiring locations. From Windermere to Coniston to summit England's highest mountain, if you love a tough and rewarding challenge - you'll thrive.
  • Sat 6 Sep
  • £240-£260
Ulverston, Cumbria, UK

THE ROC ENGLAND

Face up to the mountain in one of Europe's most inspiring locations. From Windermere to Coniston to summit England's highest mountain, if you love a tough and rewarding challenge - you'll thrive.

  • 1.5 km lake swimming
  • 92 km road cycling
  • 18.5 km multi terrain running
  • Recycling
  • Plastic bottle free
  • Music
  • Chip timing
  • Enter online
  • Mountainous
  • Event village
  • Rural
  • Mountains
  • Sustainability policy
  • Plastic-free event
  • Age 18 & over
  • Half Ironman (middle distance)
A renowned, challenging and unique event where the toughness of the course is only matched by the stunning scenery of the Lake District National Park. Not just another race but highly demanding.
  • Sun 7 Sep
  • £80-£120
Penrith, Cumbria, UK

Helvellyn Triathlon & Aquabike

A renowned, challenging and unique event where the toughness of the course is only matched by the stunning scenery of the Lake District National Park. Not just another race but highly demanding.

  • Olympic triathlon
  • Standard aquabike
  • Rural
  • Mountains
  • Age 17 & over
  • Events
Sprint or Standard Tri or Aquabike, in and around the beautiful, clean reservoir, on a flat course for all abilities with custom-designed medal, free photos and finish line goodies.
  • Sat 13 Sep
  • £78-£120
Huntingdon, Cambridgeshire, UK

ATW Grafham Triathlon

Sprint or Standard Tri or Aquabike, in and around the beautiful, clean reservoir, on a flat course for all abilities with custom-designed medal, free photos and finish line goodies.

  • Sprint triathlon
  • Olympic triathlon
  • Standard aquabike
  • Recycling
  • Newcomers
  • Event village
  • Park
  • Sustainability policy
  • Age 15 & over
  • Events
Bringing back the Sundowner! An unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire is now back on the race calendar and 100% going ahead!
  • Sat 13 Sep
  • £45-£130
York, East Yorkshire, UK

Sundowner Triathlon

Bringing back the Sundowner! An unforgettable triathlon event at Allerthorpe Lakeland Park in Yorkshire is now back on the race calendar and 100% going ahead!

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Standard aquabike
  • Middle aquabike
  • + 2 more races
  • Newcomers
  • Event village
  • Park
  • Age 18 & over
  • Events
Escape to the Cairngorms for an adventure triathlon in the scenic waters of Loch Morlich, then mountain biking and trail running in Glenmore Forest. Go Short Fast Durty or Long Hard Durty.
  • Sun 14 Sep
  • £73-£98
Aviemore, Highland, UK

Aviemore Triathlon

Escape to the Cairngorms for an adventure triathlon in the scenic waters of Loch Morlich, then mountain biking and trail running in Glenmore Forest. Go Short Fast Durty or Long Hard Durty.

  • Sprint triathlon
  • Olympic triathlon
  • Recycling
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Triathlons
Book Your Spot for the Woking Triathlon! Join one of the most popular triathlons, where athletes return year after year!
  • Sun 14 Sep
  • £20-£74.50
Woking, Surrey, UK

Woking Autumn Triathlon & Junior Aquathlon

Book Your Spot for the Woking Triathlon! Join one of the most popular triathlons, where athletes return year after year!

  • Super sprint triathlon
  • Sprint triathlon
  • Kids aquathlon 5
  • Sprint aquathlon
  • Families
  • Newcomers
  • Event village
  • Age 8 & over
  • Events
Triathlons at Dawlish Warren, a safe and supported environment for sea swimming, with a range of triathlon distances to offer a great challenge in a scenic location.
  • Sun 21 Sep
  • £45-£56
Dawlish, Devon, UK

Dawlish Triathlon

Triathlons at Dawlish Warren, a safe and supported environment for sea swimming, with a range of triathlon distances to offer a great challenge in a scenic location.

  • Super sprint triathlon
  • Sprint triathlon
  • Families
  • Trees not tees
  • Newcomers
  • Coast
  • Sustainability policy
  • Plastic-free event
  • Age 15 & over
  • Triathlons
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for all levels of triathletes and swimmers to enjoy in an exclusive setting.
  • Sun 21 Sep
  • £30-£97
Windsor, Buckinghamshire, UK

Eton Dorney Triathlon & Swims

The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for all levels of triathletes and swimmers to enjoy in an exclusive setting.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Lake swim 4
  • Families
  • Recycling
  • Newcomers
  • Dogs allowed
  • Event village
  • Urban
  • Park
  • Rural
  • Free venue entry
  • Age 15 & over
  • Events
The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.
  • Sun 21 Sep
  • £78-£180
Maldon, Essex, UK

ATW Big East & Maldon Triathlon

The Big East and Maldon Triathlon is brought to you by the largest triathlon organiser in the UK! A great experience featuring a tidal river swim.

  • Sprint triathlon
  • Olympic triathlon
  • Standard aquabike
  • Half Ironman
  • Middle aquabike
  • Newcomers
  • Event village
  • Park
  • Age 15 & over
  • Events
Get active in the award-winning grounds and surrounding Kent countryside in the discipline of your choice! Recruit your friends and celebrate completing your challenge in the festival village.
  • Sat 27 - Sun 28 Sep
  • £35-£295
Edenbridge, Kent, UK

Hever Castle Triathlon and Multisport Festival

Get active in the award-winning grounds and surrounding Kent countryside in the discipline of your choice! Recruit your friends and celebrate completing your challenge in the festival village.

  • Half Ironman
  • Olympic triathlon
  • Sprint triathlon 2
  • Super sprint triathlon
  • Novice triathlon
  • + 17 more races
  • Families
  • Newcomers
  • Event village
  • Park
  • Rural
  • Age 9 & over
  • Events
An award-winning triathlon on the incredible, unspoilt Hebridean Island of Kerrera, off Scotland's stunning west coast with the accessible marina and its facilities as the main hub.
  • Sat 27 - Sun 28 Sep
  • £73-£98
Oban, Argyll and Bute, UK

Craggy Island Triathlon

An award-winning triathlon on the incredible, unspoilt Hebridean Island of Kerrera, off Scotland's stunning west coast with the accessible marina and its facilities as the main hub.

  • Sprint triathlon 2
  • Newcomers
  • Event village
  • Rural
  • Coast
  • Free venue entry
  • Sustainability policy
  • Public transport links
  • Plastic-free event
  • Age 16 & over
  • Triathlons
Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Sat 27 Sep
  • £58-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | September

Take on a multi-activity or distance event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
  • Recycling
  • Newcomers
  • Event village
  • Sustainability policy
  • Age 15 & over
  • Events
Taking place from the wonderful North Sands, put your endurance to the test with a sociable and challenging seaside triathlon, to finish with a Salcombe Sprint Triathlon medal!
  • Sun 28 Sep
  • £65
Salcombe, Devon, UK

Salcombe Brewery Co Sprint Triathlon

Taking place from the wonderful North Sands, put your endurance to the test with a sociable and challenging seaside triathlon, to finish with a Salcombe Sprint Triathlon medal!

  • 700 m sea swimming
  • 19 km road cycling + 400 m ascent
  • 3 km trail running + 90 m ascent
  • Newcomers
  • Enter online
  • Event village
  • Coast
  • Fundraising optional
  • Age 18 & over
  • Sprint triathlons
The Torbay Triathlon Weekend is delighted to host the Devon and Somerset Fire Service Multisport Championships! Start with a 5K, followed by a team relay. One swims, one cycles, one runs.
  • Sat 4 Oct
  • £18-£48
Paignton, Devon, UK

DSFRS Multisport Championships

The Torbay Triathlon Weekend is delighted to host the Devon and Somerset Fire Service Multisport Championships! Start with a 5K, followed by a team relay. One swims, one cycles, one runs.

  • 5K run
  • Sprint triathlon
  • Relay triathlon
  • Newcomers
  • Event village
  • Park
  • Sustainability policy
  • Age 15 & over
  • Events
THE ROC takes in the Highlands. Kinlochleven to the summit of Ben Nevis and back, including a Loch swim, stunning mountain/gravel bike sections and the UK's highest mountain!
  • Sat 4 Oct
  • £240-£260
Kinlochleven, Highland, UK

THE ROC SCOTLAND

THE ROC takes in the Highlands. Kinlochleven to the summit of Ben Nevis and back, including a Loch swim, stunning mountain/gravel bike sections and the UK's highest mountain!

  • 1.5 km lake swimming
  • 53 km mountain biking
  • 18.5 km multi terrain running
  • Recycling
  • Plastic bottle free
  • Music
  • Chip timing
  • Enter online
  • Hilly
  • Mountainous
  • Event village
  • Rural
  • Mountains
  • Sustainability policy
  • Plastic-free event
  • Age 18 & over
  • Half Ironman (middle distance)
A totally traffic free festival of triathlon offering both junior and senior distance options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.
  • Sun 5 Oct
  • £22-£51
Paignton, Devon, UK

Torbay Triathlon Autumn

A totally traffic free festival of triathlon offering both junior and senior distance options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.

  • Sprint triathlon
  • Super sprint triathlon
  • Kids triathlon 7
  • Novice triathlon
  • Families
  • Trees not tees
  • Recycling
  • Newcomers
  • Park
  • Free venue entry
  • Sustainability policy
  • Plastic-free event
  • Age 5 & over
  • Triathlons
An award-winning coastal triathlon set among the safety of the sandy bay, featuring a fast bike route with Exmoor as the backdrop and a promenade run with beach finale!
  • Sun 12 Oct
  • £55
Minehead, Somerset, UK

Minehead Triathlon

An award-winning coastal triathlon set among the safety of the sandy bay, featuring a fast bike route with Exmoor as the backdrop and a promenade run with beach finale!

  • 750 m sea swimming
  • 20 km road cycling
  • 5 km multi terrain running
  • Families
  • Newcomers
  • Chip timing
  • Enter online
  • Event village
  • Coast
  • Age 14 & over
  • Sprint triathlons
A classic sprint triathlon with a fresh new energy to bring the triathlon scene back to Lincolnshire! A pool swim with a thrilling and scenic course plus a commemorative medal.
  • Sun 26 Apr 2026
  • £55
Grantham, Lincolnshire, UK

Tridents Grantham Triathlon

A classic sprint triathlon with a fresh new energy to bring the triathlon scene back to Lincolnshire! A pool swim with a thrilling and scenic course plus a commemorative medal.

  • 400 m pool swimming
  • 24 km road cycling + 230 ft ascent
  • 5 km road running + 62 ft ascent
  • Newcomers
  • Enter online
  • Event village
  • Rural
  • Sustainability policy
  • Age 17 & over
  • Sprint triathlons
Tavistock Triathlon is for all ages and abilities using the amazing Olympic legacy 50m pool at Mount Kelly with quiet rolling roads for the bike and the disused railway line for the run. What a venue!
  • Mon 4 May 2026
  • £20-£63
Tavistock, Devon, UK

Tavistock Triathlon

Tavistock Triathlon is for all ages and abilities using the amazing Olympic legacy 50m pool at Mount Kelly with quiet rolling roads for the bike and the disused railway line for the run. What a venue!

  • Olympic triathlon
  • Sprint triathlon
  • Super sprint triathlon
  • Kids triathlon 5
  • Families
  • Trees not tees
  • Recycling
  • Newcomers
  • Dogs allowed
  • Rural
  • Sustainability policy
  • Age 5 & over
  • Triathlons
The totally unique ROC format, from Abersoch Bay to the top of Wales’ highest mountain and back. Swim, Bike, Mountain, Bike, Run; THE ROC WALES is triathlon - tough and redefined.
  • Sat 9 May 2026
  • £195-£225
Pwllheli, Gwynedd, UK

THE ROC WALES

The totally unique ROC format, from Abersoch Bay to the top of Wales’ highest mountain and back. Swim, Bike, Mountain, Bike, Run; THE ROC WALES is triathlon - tough and redefined.

  • 1.5 km sea swimming
  • 100 km road cycling
  • 13 km multi terrain running + 3330 ft ascent
  • Recycling
  • Plastic bottle free
  • Entertainment
  • Music
  • Chip timing
  • Enter online
  • Hilly
  • Mountainous
  • Event village
  • Event expo
  • Coast
  • Mountains
  • Sustainability policy
  • Plastic-free event
  • Age 18 & over
  • Half Ironman (middle distance)
The UK's top outdoor sports festival! Incredible entertainment, sports events, speakers, live music, activities, brand expo, bars, food, drink and much more.
  • Fri 15 - Sun 17 May 2026
  • £30
Keswick, Cumbria, UK

Keswick Mountain Festival

The UK's top outdoor sports festival! Incredible entertainment, sports events, speakers, live music, activities, brand expo, bars, food, drink and much more.

  • 5K run 2
  • 10K run
  • Half marathon
  • 50K ultra run
  • Fell run
  • + 12 more races
  • Families
  • Wheelchair users
  • Newcomers
  • Dogs allowed
  • Entertainment
  • Music
  • Enter online
  • Event village
  • Event expo
  • Park
  • Rural
  • Mountains
  • All ages
  • Events
Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.
  • Sun 17 May 2026
  • £68-£135
Lifton, Devon, UK

Roadford Lake Triathlon

Triathlon and swim events at Roadford Lake, offering a range of distances to suit all ability levels in a safe environment, with camping options to enjoy the area after your event.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Families
  • Trees not tees
  • Recycling
  • Newcomers
  • Event village
  • Rural
  • Sustainability policy
  • Plastic-free event
  • Age 15 & over
  • Triathlons
A choice of multi-sports events including triathlon, relay triathlon and aquabike at a stunning watersports venue with immaculate water quality, scenic routes, a custom designed medal and much more.
  • Sun 24 May 2026
  • £63-£135
Bedford, Bedfordshire, UK

ATW Box End Triathlon

A choice of multi-sports events including triathlon, relay triathlon and aquabike at a stunning watersports venue with immaculate water quality, scenic routes, a custom designed medal and much more.

  • Sprint triathlon
  • Sprint aquabike
  • Olympic triathlon
  • Standard aquabike
  • Half Ironman
  • + 1 more race
  • Newcomers
  • Event village
  • Park
  • Age 15 & over
  • Events
One of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes, at the beautiful and iconic Grafham Water.
  • Sun 7 Jun 2026
  • £135-£175
Huntingdon, Cambridgeshire, UK

ATW Grafman Middle Distance Triathlon & Aquabike

One of the country’s most popular middle distance swim-bike-run events, delivered by triathletes for triathletes, at the beautiful and iconic Grafham Water.

  • Half Ironman
  • Middle aquabike
  • Recycling
  • Newcomers
  • Event village
  • Park
  • Rural
  • Sustainability policy
  • Age 18 & over
  • Events
Come join the Pendle Triathlon for this annual event! Set at West Craven Sports Centre in the beautiful Lancashire countryside.
  • Sun 7 Jun 2026
  • £2.50-£30
Barnoldswick, Lancashire, UK

Pendle Pool Triathlon powered by Fort Vale

Come join the Pendle Triathlon for this annual event! Set at West Craven Sports Centre in the beautiful Lancashire countryside.

  • Super sprint triathlon
  • Sprint triathlon
  • Super sprint duathlon
  • Sprint duathlon
  • Super sprint aquabike
  • + 3 more races
  • Newcomers
  • Event village
  • Age 15 & over
  • Events
Pedal, Paddle, Peak 2025
50% off

Pedal, Paddle, Peak 2025

Take it off-road with a multi-activity adventure! Tackle a 24-mile pedal, 2.5-mile paddle and summit Snowdon's peak then party like never before.

Find out more

Triathlon guides

Guides, tips and advice on triathlon events.

The best triathlons in the UK
  • 10 mins read
Best events

The best triathlons in the UK

From beginner races to ultra challenges, swim-bike-runs are the UK's favourite multi-sport events - these are the triathlons that you need to have on your radar.

7 things we learned from a half Ironman
  • 15 mins read
First time guide

7 things we learned from a half Ironman

Humbling and exhilarating in equal measures, a half Ironman triathlon is an unforgettable experience - following these hard-learned tips will make sure that's for all the right reasons.

Enter your first triathlon
  • 10 mins read
First time guide

Enter your first triathlon

This dynamic multi-sport will test your speed and stamina, providing an incredible experience along the way! We've got everything you need for your first swim-bike-run right here.

Triathlons near you

Select your location for triathlons in your area.