Triathlons in UK in May 2025
Find triathlons near me in UK in May 2025 - search by date or place, display on a map or use the advanced search to find your perfect race.
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Events near me
Click an event for full event details, location, route, sustainability, what's included and how to enter.
- Sat 10 May
- £240-£260
- Sat 10 May
- £240-£260
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 11 May
- £49
- Sun 11 May
- £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 17 May
- £42.50-£102.50
- Sat 17 May
- £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
- Enter online
- Hilly
- Event village
- Age 15 & over
- 400 m lake swimming
- 18 km road cycling
- 5 km trail running
- Sat 17 - Sun 18 May
- £160-£165
- Sat 17 - Sun 18 May
- £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
- Enter online
- 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 18 May
- £78-£99
- Sun 18 May
- £78-£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
- 5 km road running
- Sun 18 May
- £99-£120
- Sun 18 May
- £99-£120
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
- 10 km road running
- Sun 18 May
- £120-£140
- Sun 18 May
- £120-£140
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
- 80 km road cycling
- 20 km trail running
- Sun 18 May
- £135
- Sun 18 May
- £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
- 1900 m lake swimming
- 92 km road cycling
- 21 km road running
- Sun 18 May
- £73-£84
- Sun 18 May
- £73-£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
- 1.5 km lake swimming
- 40 km road cycling
- 10 km road running
- Sun 18 May
- £58-£60
- Sun 18 May
- £58-£60
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
- 5 km road running
- Sun 25 May
- £41.50
- Sun 25 May
- £41.50
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.
- Newcomers
- Enter online
- Undulating
- Event village
- Plastic-free event
- Age 16 & over
- 300 m pool swimming
- 21 km road cycling
- 5 km road running
- Sun 25 May
- £78-£99
- Sun 25 May
- £78-£99
Dorney Sprint Triathlon
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.
- Chip timing
- Enter online
- Flat
- PB
- Age 15 & over
- 750 m lake swimming
- 20 km road cycling
- 5 km road running
- Sun 25 May
- £99-£120
- Sun 25 May
- £99-£120
Dorney Standard Triathlon
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.
- Chip timing
- Enter online
- Flat
- PB
- Age 17 & over
- 1500 m lake swimming
- 40 km road cycling
- 10 km road running
- Sun 25 May
- £58
- Sun 25 May
- £58
Dorney Super Sprint Triathlon
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.
- Chip timing
- Enter online
- Flat
- PB
- Age 15 & over
- 400 m lake swimming
- 10 km road cycling
- 2.5 km road running
- Sun 25 May
- £80
- Sun 25 May
- £80
Dorney Lake Draft-Legal Triathlon
Incorporating Sprint Triathlon 2026 World Championships Qualifier! Dorney Lake Events provides you with an opportunity to race like an elite around this unique and inspiring Olympic venue.
- Newcomers
- Enter online
- Flat
- Event village
- Age 15 & over
- 750 m lake swimming
- 19 km road cycling
- 5 km road running
- Wed 28 May
- £58
- Wed 28 May
- £58
Midweek Dorney Super Sprint Triathlon
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.
- Chip timing
- Enter online
- Flat
- PB
- Age 15 & over
- 400 m lake swimming
- 10 km road cycling
- 2.5 km road running
- Wed 28 May
- £78
- Wed 28 May
- £78
Midweek Dorney Sprint Triathlon
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.
- Chip timing
- Enter online
- Flat
- PB
- Age 15 & over
- 750 m lake swimming
- 20 km road cycling
- 5 km road running
- Sat 10 May
Mumbles Triathlon | Olympic Distance
- 950 km sea swimming
- 42 km road cycling
- 10 km road running
- Sat 10 May
Mumbles Triathlon | Middle Distance
- 1.9 km sea swimming
- 90 km road cycling
- 21 km road running
- Sat 10 May
Mumbles Triathlon | Sprint Distance
- 750 m sea swimming
- 32 km road cycling
- 10 km road running
- Sat 10 May
TRAILDOG MultiSport | Triathlon - Saturday
- 80 m lake swimming
- 2.4 km mountain biking
- 1.7 km trail running
- Sat 10 May
Wakefield Junior Duathlon | TriStar Start
- 400 m trail running
- 1 km road cycling
- 200 m trail running
- Sat 10 May
Wakefield Junior Duathlon | TriStar 1
- 1200 m trail running
- 4 km road cycling
- 400 m trail running
- Sat 17 May
Outlaw Sprint Nottingham
- 750 m lake swimming
- 19 km road cycling
- 5 km trail running
- Sun 18 May
Outlaw Half Nottingham
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles road running
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