- 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-£140
- Sun 18 May 2025
- £120-£140
ATW Centurion 100KM Triathlon Box End
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.
- Newcomers
- Undulating
- Event village
- Park
- Sustainability policy
- 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
- £165-£186
- Sun 1 Jun 2025
- £165-£186
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
- £125
- Sun 8 Jun 2025
- £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 22 Jun 2025
- £229.99-£249.99
- Sun 22 Jun 2025
- £229.99-£249.99
Cardiff Legend (70.3) Triathlon
Situated in the renowned Cardiff Bay, this event stands out as a truly memorable city race. The event village and transition area are on Roald Dahl Plass in front of the Wales Millenium Centre.
- Chip timing
- Enter online
- Flat
- Traffic free
- Age 18 & over
- 1900 m lake swimming
- 88 km road cycling
- 21.8 km road 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 20 Jul 2025
- 1 charity
- Sun 20 Jul 2025
- 1 charity
TriBourne Festival of Endurance | Middle Distance Triathlon charity places
Award winning full and middle-distance triathlons, plus a marathon, long-distance swims, aquabike options and triathlon relays.
- Enter online
- Age 18 & over
- 1.2 miles sea swimming
- 56 miles road cycling
- 13.1 miles trail running
- Sat 2 Aug 2025
- Sat 2 Aug 2025
London T100 | 100km charity places
Formerly The London Triathlon, this is one of the world’s biggest triathlons where athletes will race through the capital on a landmark-filled route. London is calling!
- Chip timing
- Enter online
- Traffic free
- Age 17 & over
- 2 km dock swimming
- 80 km road cycling
- 18 km road running
- Sun 3 Aug 2025
- £224.99-£249.99
- Sun 3 Aug 2025
- £224.99-£249.99
Craft Snowman Legend (70.3) Triathlon
Awarded the Event of the year (2021) in the Welsh Triathlon Awards, The Craft Snowman is well known as the toughest multi-terrain triathlon in the UK. It is not for the faint-hearted.
- Chip timing
- Enter online
- Mountainous
- Age 18 & over
- 1900 m lake swimming
- 95 km mountain biking
- 21.1 km multi terrain running
- Fri 29 - Sun 31 Aug 2025
- £179
- Fri 29 - Sun 31 Aug 2025
- £179
Half Long Course Weekend
A gruelling Half Ironman-style challenge set over a weekend starting with a 1.2-Mile Swim on Friday, 56-Mile Sportive on Saturday then a Half Marathon on Sunday, supported by the best ever crowds!
- Chip timing
- Enter online
- Undulating
- Traffic free
- Age 16 & over
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles road running
- Fri 29 - Sun 31 Aug 2025
- £129
- Fri 29 - Sun 31 Aug 2025
- £129
Junior Long Course Weekend
The Long Course Weekend challenge specifically tailored to junior athletes. Swim on Friday, cycle on Saturday and run on Sunday. Same massive crowds and the same awesome experience!
- Chip timing
- Enter online
- Undulating
- Traffic free
- Age 14-17
- 1.2 miles lake swimming
- 56 miles road cycling
- 10 km road running
- Sat 6 Sep 2025
- £210-£235
- Sat 6 Sep 2025
- £210-£235
THE ROC ENGLAND
Taking THE ROC into the Lake District, this is an opportunity to test your resolve and focus in one of the most inspiring locations in Europe. Face up to the mountain.
- 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
- Sun 21 Sep 2025
- £155-£175
- Sun 21 Sep 2025
- £155-£175
ATW Big East & Maldon Triathlon | 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
- Sat 4 Oct 2025
- £220-£260
- Sat 4 Oct 2025
- £220-£260
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
Keswick Mountain Festival | Keswick Conqueror
- 3.6 km lake swimming
- 100 km road cycling + 1625 m ascent
- 25 km trail running + 866 m ascent
- Sun 8 Jun 2025
Slateman Triathlon & Duathlon | Legend (70.3) Triathlon
- 1900 m lake swimming
- 92.6 km road cycling
- 23.1 km road running
- Sun 29 Jun 2025
The Northumbrian | Half Iron Distance
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles trail running
- Sun 29 Jun 2025
Ullswater Epicman Triathlon & Duathlon | Triathlon - Middle Distance
- 1900 m lake swimming
- 90 km road cycling
- 21 km road running
- Sun 29 Jun 2025
Ultimate Half Triathlon
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles road running
- Sun 31 Aug 2025
Shropshire Triathlon | Middle Distance and Relay
- 2000 m lake swimming
- 78 km road cycling
- 20 km road running