- Sun 22 Sep
- £110
- Sun 22 Sep
- £110
The One on the River | Henley | Middle Distance Triathlon
Taking place across the scenic Thames Valley area with routes going through Culden Faw Estate. Swim the river, cycle the hilly open roads, run through the trail paths enjoying great views.
- Chip timing
- Enter online
- Age 17 & over
- 1900 m river swimming
- 89 km road cycling
- 20 km trail running
- Sun 29 Sep
- £196-£295
- Sun 29 Sep
- £196-£295
Hever Castle Triathlon and Multisport Festival | 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
- Undulating
- Age 18 & over
- 1.9 km lake swimming
- 90 km road cycling
- 21 km road running
- Sat 5 Oct
- £230-£240
- Sat 5 Oct
- £230-£240
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.
- Recycling
- Plastic bottle free
- Music
- Chip timing
- Enter online
- Hilly
- Mountainous
- Event village
- Rural
- Mountains
- Sustainability policy
- Plastic-free event
- Age 18 & over
- 1.5 km lake swimming
- 53 km mountain biking
- 18.5 km multi terrain running
- Sat 17 - Sun 18 May 2025
- £155-£160
- Sat 17 - Sun 18 May 2025
- £155-£160
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 2025
- £50-£256.80
- Sun 18 May 2025
- £50-£256.80
Outlaw Half Nottingham
Flat, fast and very popular! This open water tri comprises a swim in Regatta Lake, a relatively flat bike course and flat run laps of the lake and River Trent Path . All levels welcome, solo or relay.
- Chip timing
- Enter online
- Age 18 & over
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles road running
- Sun 18 May 2025
- £120-£139.98
- Sun 18 May 2025
- £120-£139.98
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 2025
- £135
- Sun 18 May 2025
- £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 1 Jun 2025
- £99
- Sun 1 Jun 2025
- £99
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 + 1844 ft ascent
- 21 km multi terrain running + 253 ft ascent
- Sun 8 Jun 2025
- £95-£125
- Sun 8 Jun 2025
- £95-£125
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
- 21 km multi terrain running
- Sun 15 Jun 2025
- £99
- Sun 15 Jun 2025
- £99
Plymouth Triathlon | Middle Distance
Previously known as Mount Edgcumbe Triathlon, triathletes of all abilities can experience a truly exceptional coastal venue, finishers medal, t-shirt and memorable day out at a fantastic event.
- Chip timing
- Enter online
- Age 18 & over
- 1.9 km sea swimming
- 90 km road cycling
- 20 km trail running
- Sun 29 Jun 2025
- £195-£210
- Sun 29 Jun 2025
- £195-£210
The Northumbrian | Half Iron Distance
Racing through the hills Kielder Forest and on hard-packed trails around the lake, this half distance triathlon is a serious test of endurance.
- Chip timing
- Enter online
- Hilly
- Age 18 & over
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles trail running
- Sat 5 Jul 2025
- £130
- Sat 5 Jul 2025
- £130
ATW Odyssey Half Distance 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.
- Enter online
- Undulating
- Age 18 & over
- 1900 m river swimming
- 90 km road cycling
- 21.1 km road running
- Sun 8 Sep
Vitruvian Triathlon Rutland | Triathlon
- 1.2 miles lake swimming
- 55 miles road cycling
- 13.1 miles road running
- Sun 8 Sep
Reading Triathlon | Standard Triathlon
- 1500 m lake swimming
- 44 km road cycling
- 10 km trail running
- Sun 15 Sep
IRONMAN 70.3 Weymouth
- 1.2 miles sea swimming
- 56 miles road cycling
- 13.1 miles road running
- Sun 15 Sep
Superfeet Sandman Triathlon and Duathlon | Legend (70.3)
- 1900 m sea swimming
- 93 km road cycling
- 19.8 km multi terrain running