Triathlon events calendar

Triathlon events calendar

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

📷 Outlaw Half Notts Weekend
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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.

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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 2024/2025

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

Swim Bike Run (formerly Go Tri Local) is ideal for people that are brand new to swim, bike and run and looking to take their first steps in a safe and enjoyable environment.
  • Sat 7 Dec
  • £5
Paignton, Devon, UK

Swim Bike Run Torbay

Swim Bike Run (formerly Go Tri Local) is ideal for people that are brand new to swim, bike and run and looking to take their first steps in a safe and enjoyable environment.

  • Kids triathlon
  • Novice triathlon 3
The flat terrain of the Torbay Velodrome offers a range of Duathlon distances, catering to all ages and abilities in a safe, supported and inclusive manner, with a medal and donut at the finish line!
  • Sun 16 Mar 2025
  • £17-£44
Paignton, Devon, UK

Donut Duathlon Spring

The flat terrain of the Torbay Velodrome offers a range of Duathlon distances, catering to all ages and abilities in a safe, supported and inclusive manner, with a medal and donut at the finish line!

  • Sprint duathlon
  • Super sprint triathlon
  • Kids duathlon 4
An Olympic format mixed Team Relay Triathlon using the fantastic facilities at Torbay Velopark, professionally chip timed over a traffic-free course, BTF affiliated with a great finishers medal.
  • Sat 5 Apr 2025
  • £28-£34
Paignton, Devon, UK

Torbay Triathlon Relay

An Olympic format mixed Team Relay Triathlon using the fantastic facilities at Torbay Velopark, professionally chip timed over a traffic-free course, BTF affiliated with a great finishers medal.

  • 300 m pool swimming
  • 6 km road cycling
  • 1.8 km multi terrain running
A totally traffic free festival of triathlon offering junior, senior and relay options on the English Riviera. Pool swimming along with tarmac cycling and a parkland run, with a great medal.
  • Sun 6 Apr 2025
  • £21-£51
Paignton, Devon, UK

Torbay Triathlon Spring

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

  • Sprint triathlon
  • Novice triathlon
  • Kids triathlon 7
  • Super sprint triathlon
Test every discipline in this unforgettable triathlon set along the South West Coast. Catch sight of the iconic Portland Bill lighthouse as you cycle around the beautiful Isle of Portland.
  • Sun 6 Apr 2025
  • £38.50
Portland, Dorset, UK

The Osprey Sprint Triathlon

Test every discipline in this unforgettable triathlon set along the South West Coast. Catch sight of the iconic Portland Bill lighthouse as you cycle around the beautiful Isle of Portland.

  • 300 m pool swimming
  • 15 km road cycling
  • 5 km trail running
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!
  • Sun 4 May 2025
  • £22-£59
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
  • Novice triathlon
  • Kids triathlon 5
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 4 May 2025
  • £53-£94
Saint Neots, Cambridgeshire, UK

ATW St Neots Triathlon | Race 1

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
This popular weekend of multisport welcomes everyone to a wide range of activities, lively event village, grandstand seating, relay options, youth events plus some exciting new additions!
  • Sat 17 - Sun 18 May 2025
  • £12.84-£256.80
Nottingham, Nottinghamshire, UK

Outlaw Half Nottingham Weekend

This popular weekend of multisport welcomes everyone to a wide range of activities, lively event village, grandstand seating, relay options, youth events plus some exciting new additions!

  • Fun run 2
  • Sprint triathlon
  • Middle aquabike
  • Half Ironman
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.
  • Sat 17 - Sun 18 May 2025
  • £68-£140
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
  • Relay 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.
  • Sun 18 May 2025
  • £58-£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
Challenge yourself to tackle a 100km Centurion this year, a distance made popular by the PTO race series. Ideal if you're training for a 70.3 Half-Iron or taking a step up from Standard Distance Tri.
  • Sun 18 May 2025
  • £120-£140
Bedford, Bedfordshire, UK

ATW Centurion 100KM Triathlon Box End

Challenge yourself to tackle a 100km Centurion this year, a distance made popular by the PTO race series. Ideal if you're training for a 70.3 Half-Iron or taking a step up from Standard Distance Tri.

  • 2250 m lake swimming
  • 80 km road cycling
  • 20 km trail running
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Sun 25 May 2025
  • £58-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | May

Take on this multi-activity 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
Bike past historic landmarks, and run beside the Great Feild at Poundbury. As you finish each leg of the course, you’ll get closer to the crowds of people cheering you on at that final stretch.
  • Sun 25 May 2025
  • £41.50
Dorchester, Dorset, UK

The Dorchester Sprint Triathlon

Bike past historic landmarks, and run beside the Great Feild at Poundbury. As you finish each leg of the course, you’ll get closer to the crowds of people cheering you on at that final stretch.

  • 300 m pool swimming
  • 21 km road cycling
  • 5 km road running
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Wed 28 May 2025
  • £58-£78
Windsor, Buckinghamshire, UK

Midweek Dorney Triathlon | May

Take on this multi-activity 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
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 1 Jun 2025
  • £145-£186
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
  • Standard aquabike
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 7 Jun 2025
  • £58-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | June

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
The successful Dartmouth Triathlon returns with a stunning sea swim, stunning coastal bike route, out and back run including Devon's flattest road, plus chance to camp on the beach!
  • Sun 8 Jun 2025
  • £59-£81
Dartmouth, Devon, UK

Dartmouth Triathlon

The successful Dartmouth Triathlon returns with a stunning sea swim, stunning coastal bike route, out and back run including Devon's flattest road, plus chance to camp on the beach!

  • Olympic triathlon
  • Sprint triathlon
Whichever distance you choose, this triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.
  • Sun 8 Jun 2025
  • £60-£125
Weymouth, Dorset, UK

The WMD Triathlon

Whichever distance you choose, this triathlon will not fail to impress. With stunning views of Weymouth nature reserve and a true test of stamina, you'll be beaming with pride at the finish line.

  • Half Ironman
  • Olympic triathlon
  • Sprint triathlon
Located at the Stewartby Sailing Club this venue is perfect for triathlon and aquabike and was host to a sold-out GB team qualifier event in 2023, with probably the fastest bike leg in the country!
  • Sun 15 Jun 2025
  • £62-£115
Bedford, Bedfordshire, UK

ATW Stewartby Lake Triathlon & Aquabike

Located at the Stewartby Sailing Club this venue is perfect for triathlon and aquabike and was host to a sold-out GB team qualifier event in 2023, with probably the fastest bike leg in the country!

  • Sprint triathlon
  • Olympic triathlon
  • Sprint aquabike
  • Standard aquabike
Previously known as Mount Edgcumbe Triathlon, triathletes and swimmers of all abilities can experience a truly exceptional venue, finishers medal, t-shirt and memorable day out at a fantastic event.
  • Sun 15 Jun 2025
  • £25-£99
Torpoint, Cornwall, UK

Plymouth Triathlon & Plymouth Swim

Previously known as Mount Edgcumbe Triathlon, triathletes and swimmers of all abilities can experience a truly exceptional venue, finishers medal, t-shirt and memorable day out at a fantastic event.

  • Kids triathlon 3
  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Sea swim 3
Situated in the renowned Cardiff Bay, this event stands out as a truly memorable city race. The event village and transition area are on Roald Dahl Plass in front of the Wales Millenium Centre.
  • Sun 22 Jun 2025
  • £78.99-£249.99
Cardiff, UK

Cardiff Triathlon and Duathlon

Situated in the renowned Cardiff Bay, this event stands out as a truly memorable city race. The event village and transition area are on Roald Dahl Plass in front of the Wales Millenium Centre.

  • Super sprint triathlon
  • Sprint triathlon
  • Olympic triathlon 2
  • Half Ironman
  • Sprint duathlon
Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. Torre Abbey Sands has excellent water quality.
  • Sun 29 Jun 2025
  • £30-£79
Torquay, Devon, UK

English Riviera Triathlon

Start with a great sea swim in warm waters then on to the bikes for a closed road and flat bike leg. Finally there's a run with views of the sea. Torre Abbey Sands has excellent water quality.

  • Sprint triathlon
  • Olympic triathlon
  • Super sprint triathlon
  • Kids triathlon 2
Take on this multi-activity event and take the opportunity to race around this unique and inspiring Olympic venue! Great water quality and flat, scenic grounds.
  • Wed 2 Jul 2025
  • £58-£78
Windsor, Buckinghamshire, UK

Midweek Dorney Triathlon | July

Take on this multi-activity 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
Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a run around the beautiful town of St Neots.
  • Sat 5 Jul 2025
  • £130-£270
Saint Neots, Cambridgeshire, UK

ATW Odyssey Triathlon

Complete your own Odyssey on a journey of self-discovery in the Cambridgeshire countryside featuring a swim in the River Ouse, a scenic ride and a run around the beautiful town of St Neots.

  • Ironman
  • Half Ironman
Top 21 must-do triathlon challenges! Based at the beautiful, award-winning Putsborough Sands and sold out again last year, this triathlon takes in some of the South West’s most stunning scenery.
  • Sun 6 Jul 2025
  • £65-£129
Braunton, Devon, UK

Croyde Ocean Triathlon

Top 21 must-do triathlon challenges! Based at the beautiful, award-winning Putsborough Sands and sold out again last year, this triathlon takes in some of the South West’s most stunning scenery.

  • Sprint triathlon
  • Olympic triathlon
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 6 Jul 2025
  • £53-£94
Saint Neots, Cambridgeshire, UK

ATW St Neots Triathlon | Race 2

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
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 2025
  • £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
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. It is not for the faint-hearted.
  • Sun 3 Aug 2025
  • £69.99-£249.99
Betws-y-Coed, Clwyd, UK

Craft Snowman Triathlon and Duathlon

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. It is not for the faint-hearted.

  • Sprint triathlon
  • Olympic triathlon
  • Half Ironman
  • Sprint duathlon
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 2025
  • £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
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 2025
  • £53-£94
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
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 2025
  • £53-£95
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
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 2025
  • £16-£28
Peterborough, 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
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 2025
  • £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
The Long Course Weekend Yorkshire is back for a second year! A huge multi-sport festival in stunning Nidderdale featuring runs, rides, triple-style challenges and junior events too.
  • Fri 29 - Sun 31 Aug 2025
  • £10-£545
Masham, North Yorkshire, UK

Long Course Weekend Yorkshire

The Long Course Weekend Yorkshire is back for a second year! A huge multi-sport festival in stunning Nidderdale featuring runs, rides, triple-style challenges and junior events too.

  • Ironman
  • Half Ironman
  • Kids triathlon
  • Lake swim 2
  • Long sportive
  • + 6 more races
Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.
  • Sat 6 Sep 2025
  • £210-£235
Ulverston, Cumbria, UK

THE ROC ENGLAND

Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.

  • 1.5 km lake swimming
  • 92 km road cycling
  • 18.5 km multi terrain running
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 2025
  • £42-£61
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
  • Sprint aquathlon
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 2025
  • £73-£175
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
Scotland, you are immense. ROC Scotland athletes, you are legends! THE ROC takes on the Highlands, from Kinlochleven to the summit of Ben Nevis, the UK’s highest mountain and back.
  • Sat 4 Oct 2025
  • £220-£260
Kinlochleven, Highland, UK

THE ROC SCOTLAND

Scotland, you are immense. ROC Scotland athletes, you are legends! THE ROC takes on the Highlands, from Kinlochleven to the summit of Ben Nevis, the UK’s highest mountain and back.

  • 1.5 km lake swimming
  • 53 km mountain biking
  • 18.5 km multi terrain running
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 2025
  • £18-£42
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
  • Sat 17 May 2025
  • £32.50-£97.50
Keswick, Cumbria, UK

Keswick Mountain Festival | Sprint Triathlon

One of the most thrilling triathlons in the country on a super-exciting route with challenging ascents, descents and open roads, narrow in parts. Includes Full Weekend Festival Ticket in the price!

  • 400 m lake swimming
  • 18 km road cycling
  • 5 km trail running
  • Sat 17 - Sun 18 May 2025
  • £155-£160
Keswick, Cumbria, UK

Keswick Mountain Festival | Keswick Conqueror

A lake swim, a trail run and a road ride over the course of the festival weekend. Conquer a triathlon challenge over two days. Includes Full Weekend Festival Ticket in the price!

  • 3.6 km lake swimming
  • 100 km road cycling + 1625 m ascent
  • 25 km trail running + 866 m ascent
Pedal, Paddle, Peak 2025
10th edition

Pedal, Paddle, Peak 2025

Take it off-road with the multi-activity adventure of the year! Tackle a 34km pedal, 3km paddle, 17km summit to Helvellyn's peak then party like never before.

Find out more

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