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Triathlons in UK in September 2025

Find triathlons near me in UK in September 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.

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Click an event for full event details, location, route, sustainability, what's included and how to enter.

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
  • 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.

  • Recycling
  • Plastic bottle free
  • Music
  • Chip timing
  • Enter online
  • Mountainous
  • Event village
  • Rural
  • Mountains
  • Sustainability policy
  • Plastic-free event
  • Age 18 & over
  • 1.5 km lake swimming
  • 92 km road cycling
  • 18.5 km multi terrain running
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
  • £99-£120
  • Sun 7 Sep
  • £99-£120
Penrith, Cumbria, UK

Helvellyn Triathlon

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.

  • Enter online
  • Mountainous
  • Age 17 & over
  • 1.5 km lake swimming
  • 59 km road cycling
  • 15 km trail running
Athletes of all levels are guaranteed to enjoy the Sprint Triathlon at this fantastic venue that has been used for award-winning triathlons, national championships and GB qualifier races!
  • Sat 13 Sep
  • £78
  • Sat 13 Sep
  • £78
Huntingdon, Cambridgeshire, UK

ATW Grafham Sprint Triathlon

Athletes of all levels are guaranteed to enjoy the Sprint Triathlon at this fantastic venue that has been used for award-winning triathlons, national championships and GB qualifier races!

  • Chip timing
  • Enter online
  • Flat
  • Age 15 & over
  • 750 m lake swimming
  • 17 km road cycling
  • 5 km road running
Athletes of all levels are guaranteed to enjoy The Standard Triathlon at this fantastic venue that has been used for award-winning triathlons, national championships and GB qualifier races!
  • Sat 13 Sep
  • £99-£120
  • Sat 13 Sep
  • £99-£120
Huntingdon, Cambridgeshire, UK

ATW Grafham Standard Triathlon

Athletes of all levels are guaranteed to enjoy The Standard Triathlon at this fantastic venue that has been used for award-winning triathlons, national championships and GB qualifier races!

  • Chip timing
  • Enter online
  • Age 17 & over
  • 1500 m lake swimming
  • 38 km road cycling
  • 10 km road running
Book Your Spot for the Woking Super Sprint Triathlon! Join one of the most popular triathlons in the area, where athletes return year after year!
  • Sun 14 Sep
  • £49.50
  • Sun 14 Sep
  • £49.50
Woking, Surrey, UK

Woking Autumn Triathlon & Junior Aquathlon | Super Sprint Triathlon

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

  • Enter online
  • Flat
  • Age 15 & over
  • 200 m pool swimming
  • 13.6 km road cycling
  • 3.3 km trail running
Book Your Spot for the Woking Sprint Triathlon! Join one of the most popular triathlons in the area, where athletes return year after year!
  • Sun 14 Sep
  • £59.50-£74.50
  • Sun 14 Sep
  • £59.50-£74.50
Woking, Surrey, UK

Woking Autumn Triathlon & Junior Aquathlon | Sprint Triathlon

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

  • Enter online
  • Flat
  • Age 15 & over
  • 400 m pool swimming
  • 20.6 km road cycling
  • 5 km trail running
Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.
  • Sun 14 Sep
  • £83-£98
  • Sun 14 Sep
  • £83-£98
Aviemore, Highland, UK

Aviemore Triathlon | Long Hard Durty

Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.

  • Chip timing
  • Enter online
  • Hilly
  • Age 15 & over
  • 1000 m lake swimming
  • 18 km mountain biking
  • 9 km trail running
Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.
  • Sun 14 Sep
  • £73-£88
  • Sun 14 Sep
  • £73-£88
Aviemore, Highland, UK

Aviemore Triathlon | Short Fast Durty

Join the Aviemore Triathlon in the beautiful Cairgorms and enjoy an open water swim in the cool, calm waters of Loch Morlich and enjoy mountain biking and running on the trails of Glenmore Forest.

  • Chip timing
  • Enter online
  • Age 15 & over
  • 500 m lake swimming
  • 12 km mountain biking
  • 5 km trail running
Start with a sea swim then it’s onto the bikes for two laps of a relatively sheltered and flat bike circuit. Then take in the coast path for some stunning views as you approach the finish line.
  • Sun 21 Sep
  • £56
  • Sun 21 Sep
  • £56
Dawlish, Devon, UK

Dawlish Triathlon | Sprint

Start with a sea swim then it’s onto the bikes for two laps of a relatively sheltered and flat bike circuit. Then take in the coast path for some stunning views as you approach the finish line.

  • Chip timing
  • Enter online
  • Flat
  • Age 15 & over
  • 750 m sea swimming
  • 24 km road cycling
  • 5 km road running
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for Standard-distance triathletes to enjoy in an exclusive setting.
  • Sun 21 Sep
  • £82-£97
  • Sun 21 Sep
  • £82-£97
Windsor, Buckinghamshire, UK

Eton Dorney Standard Triathlon

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

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 17 & over
  • 1.5 km lake swimming
  • 40 km road cycling
  • 10 km trail running
Start with a sea swim then it’s onto the bikes for two laps of a relatively sheltered and flat bike circuit. Then take in the coast path for some stunning views as you approach the finish line.
  • Sun 21 Sep
  • £45
  • Sun 21 Sep
  • £45
Dawlish, Devon, UK

Dawlish Triathlon | Super Sprint

Start with a sea swim then it’s onto the bikes for two laps of a relatively sheltered and flat bike circuit. Then take in the coast path for some stunning views as you approach the finish line.

  • Chip timing
  • Enter online
  • Flat
  • Age 15 & over
  • 300 m sea swimming
  • 16 km road cycling
  • 5 km road running
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for Sprint triathletes to enjoy in an exclusive setting.
  • Sun 21 Sep
  • £72-£87
  • Sun 21 Sep
  • £72-£87
Windsor, Buckinghamshire, UK

Eton Dorney Sprint Triathlon

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

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 15 & over
  • 750 m lake swimming
  • 20 km road cycling
  • 5 km trail running
The Olympic venue, Eton Dorney, offers pan-flat, traffic-free roads and a beautiful clear lake for Super Sprint triathletes to enjoy in an exclusive setting.
  • Sun 21 Sep
  • £62-£77
  • Sun 21 Sep
  • £62-£77
Windsor, Buckinghamshire, UK

Eton Dorney Super Sprint Triathlon

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

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Traffic free
  • Age 15 & over
  • 450 m lake swimming
  • 10 km road cycling
  • 2.5 km trail running
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
  • £99-£120
  • Sun 21 Sep
  • £99-£120
Maldon, Essex, UK

ATW Big East & Maldon Standard 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.

  • Enter online
  • Undulating
  • Age 17 & over
  • 1500 m river swimming
  • 40 km road cycling
  • 10 km trail running
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
  • £160-£180
  • Sun 21 Sep
  • £160-£180
Maldon, Essex, UK

Big East Middle Distance 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.

  • Enter online
  • Undulating
  • Age 18 & over
  • 1500 m river swimming
  • 86 km road cycling
  • 20 km trail running
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-£99
  • Sun 21 Sep
  • £78-£99
Maldon, Essex, UK

ATW Big East & Maldon Sprint 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.

  • Enter online
  • Undulating
  • Age 15 & over
  • 750 m river swimming
  • 25 km road cycling
  • 5 km trail running
Get the family active in the award-winning castle grounds in a triathlon for all abilities - even beginners then celebrate with friends and family in the festival village.
  • Sat 27 Sep
  • £35-£60
  • Sat 27 Sep
  • £35-£60
Edenbridge, Kent, UK

Hever Castle Triathlon and Multisport Festival | Triathlon 9-10 years

Get the family active in the award-winning castle grounds in a triathlon for all abilities - even beginners then celebrate with friends and family in the festival village.

  • Chip timing
  • Enter online
  • Age 9-10
  • 200 m lake swimming
  • 4.2 km road cycling
  • 1.3 km road running
Get active in the award-winning grounds and surrounding Kent countryside in a Sprint Aquathlon! Recruit your friends and celebrate completing your challenge in the festival village.
  • Sat 27 Sep
  • £50
  • Sat 27 Sep
  • £50
Edenbridge, Kent, UK

Hever Castle | Sprint Aquathlon

Get active in the award-winning grounds and surrounding Kent countryside in a Sprint Aquathlon! Recruit your friends and celebrate completing your challenge in the festival village.

  • Chip timing
  • Enter online
  • Age 15 & over
  • 750 m lake swimming
  • 5 km road running
Get active in the award-winning grounds and surrounding Kent countryside in the a Sprint Plus Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.
  • Sat 27 Sep
  • £115-£155
  • Sat 27 Sep
  • £115-£155
Edenbridge, Kent, UK

Hever Castle | Sprint Plus Triathlon

Get active in the award-winning grounds and surrounding Kent countryside in the a Sprint Plus Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.

  • Chip timing
  • Enter online
  • Age 17 & over
  • 800 m lake swimming
  • 40 km road cycling
  • 8 km road running
Get active in the award-winning grounds and surrounding Kent countryside in a Sprint Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.
  • Sat 27 Sep
  • £100-£150
  • Sat 27 Sep
  • £100-£150
Edenbridge, Kent, UK

Hever Castle | Sprint Triathlon

Get active in the award-winning grounds and surrounding Kent countryside in a Sprint Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.

  • Chip timing
  • Enter online
  • Age 15 & over
  • 750 m lake swimming
  • 20 km road cycling
  • 5 km road running
Get active in the award-winning grounds and surrounding Kent countryside in a Super Sprint Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.
  • Sat 27 Sep
  • £95-£145
  • Sat 27 Sep
  • £95-£145
Edenbridge, Kent, UK

Hever Castle | Super Sprint Triathlon

Get active in the award-winning grounds and surrounding Kent countryside in a Super Sprint Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.

  • Chip timing
  • Enter online
  • Age 15 & over
  • 400 m lake swimming
  • 20 km road cycling
  • 4 km road running
Get active in the award-winning grounds and surrounding Kent countryside in a Starter Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.
  • Sat 27 Sep
  • £80-£120
  • Sat 27 Sep
  • £80-£120
Edenbridge, Kent, UK

Hever Castle | Starter Triathlon

Get active in the award-winning grounds and surrounding Kent countryside in a Starter Triathlon! Recruit your friends and celebrate completing your challenge in the festival village.

  • Chip timing
  • Enter online
  • Age 15 & over
  • 200 m lake swimming
  • 14 km road cycling
  • 2.5 km road running
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
  • £78-£99
  • Sat 27 Sep
  • £78-£99
Windsor, Buckinghamshire, UK

Dorney Triathlon | September | Sprint Triathlon

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.

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Age 15 & over
  • 750 m lake swimming
  • 20 km road cycling
  • 5 km road running
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
  • £99-£120
  • Sat 27 Sep
  • £99-£120
Windsor, Buckinghamshire, UK

Dorney Triathlon | September | Standard Triathlon

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.

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Age 17 & over
  • 1500 m lake swimming
  • 40 km road cycling
  • 10 km road running
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
  • Sat 27 Sep
  • £58
Windsor, Buckinghamshire, UK

Dorney Triathlon | September | Super Sprint Triathlon

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.

  • Chip timing
  • Enter online
  • Flat
  • PB
  • Age 15 & over
  • 400 m lake swimming
  • 10 km road cycling
  • 2.5 km road running

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