Triathlons in UK
Find triathlons near me in UK for 2025/2026 - filter by date or location, display on a map or use the advanced search to find your perfect race.
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Event listings
Select an event for photos, video, route, location, reviews, entry fees and how to enter.
- Mon 4 May 2026
- £27
Tavistock Triathlon | TriStar 3
TriStar 3 for children aged 13-14. Pool swim, bike and also run are all mainly on grass in the grounds of Mount Kelly.
- Enter online
- Age 13-14
- 300 m pool swimming
- 6 km gravel riding
- 2.6 km multi terrain running
- Mon 4 May 2026
- £24
Tavistock Triathlon | TriStar 2
TriStar 2 for children aged 11-12. Pool swim, bike and also run are all mainly on grass in the grounds of Mount Kelly.
- Enter online
- Age 11-12
- 200 m pool swimming
- 3.6 km gravel riding
- 1.95 km multi terrain running
- Mon 4 May 2026
- £22
Tavistock Triathlon | TriStar 1
TriStar 1 for children age 9-10. Pool swim, bike and also run are all mainly on grass in the grounds of Mount Kelly.
- Enter online
- Age 9-10
- 150 m pool swimming
- 2.4 km gravel riding
- 1.3 km multi terrain running
- Mon 4 May 2026
- £21
Tavistock Triathlon | Tristar Start
TriStar Start Kids age 8. Pool swim, bike and also run are all mainly on grass in the grounds of Mount Kelly.
- Enter online
- Age 8-8
- 50 m pool swimming
- 1 km gravel riding
- 450 m multi terrain running
- Mon 4 May 2026
- £20
Tavistock Triathlon | Mini Tri
New! For kids age 5+. Pool swim, bike and also run are all mainly on grass in the grounds of Mount Kelly.
- Enter online
- Age 5-7
- 25 m pool swimming
- 1 km gravel riding
- 450 m multi terrain running
- Sat 9 May 2026
- £195-£225
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.
- 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
- 1.5 km sea swimming
- 100 km road cycling
- 13 km multi terrain running + 3330 ft ascent
- Sun 10 May 2026
- £49
HSV Sprint Triathlon
This is a great triathlon for all standards, from the absolute beginner right through to the seasoned triathlete. The course is fast, flat and has great PB potential.
- Enter online
- Flat
- PB
- Age 15 & over
- 400 m pool swimming
- 20 km road cycling
- 5 km road running
- Sat 16 May 2026
- £42.50-£102.50
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!
- Newcomers
- Chip timing
- Hilly
- Event village
- Age 15 & over
- 400 m lake swimming
- 18 km road cycling
- 5 km trail running
- Sat 16 - Sun 17 May 2026
- £160-£165
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!
- Newcomers
- Music
- Chip timing
- Mountainous
- Event village
- Age 18 & over
- 3.6 km lake swimming
- 100 km road cycling + 1625 m ascent
- 25 km trail running + 866 m ascent
- Sun 17 May 2026
- £135
Roadford Lake Triathlon | Middle Distance
This triathlon returns for another successful year! It’s a superb swimming venue with quiet rolling roads for the bike course and a cracking run too. Plus there's lakeside camping available too.
- Chip timing
- Enter online
- Undulating
- Age 18 & over
- 1.9 m lake swimming
- 93 km road cycling + 8490 ft ascent
- 20 km road running + 3288 ft ascent
- Sun 17 May 2026
- £82-£84
Roadford Lake Triathlon | Standard
This triathlon returns for another successful year! It’s a superb swimming venue with quiet rolling roads for the bike course and a cracking run too. Plus there's lakeside camping available too.
- Chip timing
- Enter online
- Undulating
- Age 17 & over
- 1500 m lake swimming
- 46 km road cycling + 4245 ft ascent
- 10 km road running + 1644 ft ascent
- Sun 17 May 2026
- £68
Roadford Lake Triathlon | Sprint
This triathlon returns for another successful year! It’s a superb swimming venue with quiet rolling roads for the bike course and a cracking run too. Plus there's lakeside camping available too.
- Chip timing
- Enter online
- Undulating
- Age 15 & over
- 750 m lake swimming
- 20 km road cycling + 1778 ft ascent
- 5 km road running + 822 ft ascent
- Sun 24 May 2026
- £73-£99
ATW Box End Sprint Triathlon
Stunning watersports venue with immaculate water quality, scenic run route, custom designed medal plus team relay option.
- Enter online
- Age 15 & over
- 750 m lake swimming
- 26 km road cycling + 558 ft ascent
- 5 km road running + 85 ft ascent
- Sun 24 May 2026
- £94-£115
ATW Box End Standard Triathlon
Stunning watersports venue with immaculate water quality, scenic run route, custom designed medal plus team relay option.
- Enter online
- Age 17 & over
- 1500 m lake swimming
- 40 km road cycling + 837 ft ascent
- 10 km road running + 170 ft ascent
- Sun 24 May 2026
- £120-£135
ATW Box End Centurion 100km Triathlon
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.
- Enter online
- Undulating
- Age 18 & over
- 2250 m lake swimming
- 81 km road cycling + 1674 ft ascent
- 20 km trail running + 340 ft ascent
- Sun 7 Jun 2026
- £155-£175
ATW Grafman Middle Distance Triathlon
Take on a superb middle distance triathlon at the fantastic Grafham Water. Suitable for all abilites, with a challenging, but achievable course, and custom medal at the finish line.
- Chip timing
- Enter online
- Undulating
- Age 18 & over
- 1900 m lake swimming
- 90 km road cycling + 1680 ft ascent
- 21 km multi terrain running + 0 ft ascent
- Sun 7 Jun 2026
- £85
Dartmouth Triathlon | Standard
Swim in the clear waters of Blackpool Sands, then take a scenic coastal bike route featuring Devon's flattest road, then run by a stream. Plus chance to camp on the beach!
- Chip timing
- Enter online
- Age 15 & over
- 1500 m sea swimming
- 40 km road cycling + 2134 ft ascent
- 10 km road running + 456 ft ascent
- Sun 7 Jun 2026
- £70-£90
Dartmouth Triathlon | Sprint
Swim in the clear waters of Blackpool Sands, then take a scenic coastal bike route featuring Devon's flattest road, then run by a stream. Plus chance to camp on the beach!
- Chip timing
- Enter online
- Age 15 & over
- 750 m sea swimming
- 20 km road cycling + 1067 ft ascent
- 5 km road running + 228 ft ascent
- Sun 7 Jun 2026
- £25
Pendle Pool Triathlon powered by Fort Vale | Super Sprint Triathlon
Come join the Pendle Triathlon for this annual event! Set at West Craven Sports Centre in the beautiful Lancashire countryside.
- Chip timing
- Enter online
- PB
- Age 15 & over
- 200 m pool swimming
- 11 km road cycling + 308 ft ascent
- 2.5 km road running + 100 ft ascent
- Sun 7 Jun 2026
- £30
Pendle Pool Triathlon powered by Fort Vale | Sprint Triathlon
Come join the Pendle Triathlon for this annual event! Set at West Craven Sports Centre in the beautiful Lancashire countryside.
- Chip timing
- Enter online
- PB
- Age 15 & over
- 400 m pool swimming
- 22 km road cycling + 616 ft ascent
- 5 km road running + 200 ft ascent
- Sun 14 Jun 2026
- £135
Weymouth WMD Triathlon | Weymouth Middle Distance Triathlon
The Middle Distance 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.
- Chip timing
- Enter online
- Undulating
- Age 18 & over
- 1900 m sea swimming
- 90 km road cycling + 2501 ft ascent
- 21 km multi terrain running + 259 ft ascent
- Sun 14 Jun 2026
- £80
Weymouth WMD Triathlon | Weymouth WMD Classic Triathlon
The Classic 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.
- Chip timing
- Enter online
- Undulating
- Age 18 & over
- 1500 m sea swimming
- 40 km road cycling + 1040 ft ascent
- 10 km multi terrain running + 132 ft ascent
- Sun 14 Jun 2026
- £70
Weymouth WMD Triathlon | Weymouth WMD Sprint Triathlon
The Sprint 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.
- Chip timing
- Enter online
- Undulating
- Age 18 & over
- 750 m sea swimming
- 20 km road cycling + 659 ft ascent
- 5 km multi terrain running + 69 ft ascent
- Sat 20 Jun 2026
- £92-£115
Cholmondeley Castle | Sprint Plus Triathlon
Get active in the beautiful grounds and surrounding area of stunning Cheshire in a Sprint Plus Triathlon! Bring your friends and celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Age 17 & over
- 800 m lake swimming
- 42 km road cycling
- 8 km road running
- Sat 20 Jun 2026
- £80-£100
Cholmondeley Castle | Sprint Triathlon
Get active in the beautiful grounds and surrounding area of stunning Cheshire in a Sprint Triathlon! Bring your friends and celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Age 15 & over
- 750 m lake swimming
- 28 km road cycling
- 5 km road running