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Relay triathlons in UK in September 2025

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

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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
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 + 748 ft ascent
  • 10 km road 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
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 + 249 ft ascent
  • 5 km trail running + 75 ft ascent
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
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
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
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
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
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
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
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
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 + 479 ft ascent
  • 10 km trail running + 86 ft ascent
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
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 + 1112 ft ascent
  • 20 km trail running + 172 ft ascent
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
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 + 230 ft ascent
  • 5 km trail running + 43 ft ascent
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
Windsor, Buckinghamshire, UK

Dorney Triathlon | September | Sprint

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
Windsor, Buckinghamshire, UK

Dorney Triathlon | September | Standard

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
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
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
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 + 819 ft ascent
  • 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
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 + 819 ft ascent
  • 4 km road running + 114 ft ascent
Entries closed
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 Sep
  • £73-£98
Oban, Argyll and Bute, UK

Craggy Island Triathlon | Saturday

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.

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 16 & over
  • 600 m sea swimming
  • 16 km mountain biking + 362 m ascent
  • 8.5 km trail running + 234 m ascent
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
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 + 591 ft ascent
  • 2.5 km road running + 69 ft ascent
Not for the faint hearted, this race pushes competitors to their limits whilst visiting every corner of the beautiful castle estate and its surrounding rural area into the High Weald AONB.
  • Sun 28 Sep
  • £245-£295
Edenbridge, Kent, UK

Hever Castle | Gauntlet Triathlon

Not for the faint hearted, this race pushes competitors to their limits whilst visiting every corner of the beautiful castle estate and its surrounding rural area into the High Weald AONB.

  • Chip timing
  • Enter online
  • Age 18 & over
  • 1.9 km lake swimming
  • 90 km road cycling + 2392 ft ascent
  • 21 km road running
Great Britain Age Group 2026 Team Qualifier. Get active in the award-winning grounds and surrounding Kent countryside in an Olympic Triathlon in an event for all ability levels then celebrate after!
  • Sun 28 Sep
  • £125-£165
Edenbridge, Kent, UK

Hever Castle | Olympic Triathlon

Great Britain Age Group 2026 Team Qualifier. Get active in the award-winning grounds and surrounding Kent countryside in an Olympic Triathlon in an event for all ability levels then celebrate after!

  • Chip timing
  • Enter online
  • Age 17 & over
  • 1.5 km lake swimming
  • 40 km road cycling
  • 10 km road running
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.
  • Sun 28 Sep
  • £73-£98
Oban, Argyll and Bute, UK

Craggy Island Triathlon | Sunday

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.

  • Chip timing
  • Enter online
  • Undulating
  • Traffic free
  • Age 16 & over
  • 600 m sea swimming
  • 16 km mountain biking + 362 m ascent
  • 8.5 km trail running + 234 m ascent
  • Sun 14 Sep
Weymouth, Dorset, UK

IRONMAN 70.3 Weymouth

  • 1.2 miles sea swimming
  • 56 miles road cycling
  • 13.1 miles road running
  • Sun 14 Sep
Nantwich, Cheshire, UK

North West Triathlon | Sprint and Relay

  • 500 m pool swimming
  • 21 km road cycling
  • 5 km trail running
  • Sun 14 Sep
Nantwich, Cheshire, UK

North West Triathlon | CRUK Wave and Relay

  • 200 m pool swimming
  • 21 km road cycling
  • 2.5 km trail running
  • Sun 21 Sep
Aldeburgh, Suffolk, UK

Aldeburgh Fun Team Relay Triathlon

  • 750 m sea swimming
  • 22 km road cycling
  • 5 km trail running
  • Sun 28 Sep
Stratford-upon-Avon, Warwickshire, UK

Warwickshire Triathlon | Sprint and Relay

  • 400 m pool swimming
  • 18 km road cycling
  • 5 km road running

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