Half Ironman (middle distance) in UK
Find half ironman (middle distance) near me in UK for 2025/2026 - 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.
- Sun 15 Jun
- £120
- Sun 15 Jun
- £120
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
- £249.99
- Entries close soon
- Sun 22 Jun
- £249.99
- Entries close soon
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
- 90 km road cycling + 1059 ft ascent
- 21.8 km road running + 311 ft ascent
- Sun 22 Jun
- £245-£295
- Sun 22 Jun
- £245-£295
Cholmondeley Castle | Gauntlet Triathlon
Get active in the beautiful grounds and surrounding area of stunning Cheshire in the epic Gauntlet! Bring your friends and celebrate completing your challenge in the festival village.
- Chip timing
- Enter online
- Age 18 & over
- 1.9 km lake swimming
- 84 km road cycling
- 21 km road running
- Sat 5 Jul
- £155-£175
- Sat 5 Jul
- £155-£175
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 19 & over
- 1900 m river swimming
- 90 km road cycling
- 21.1 km road running
- Sat 19 Jul
- £265-£295
- Sat 19 Jul
- £265-£295
Castle To Coast Triathlon
Swim, bike, run your way from Windsor Castle to Brighton on this unique, non-competitive, point-to-point adventure through the North & South Downs. Fully way-marked (no navigation) and full support.
- Newcomers
- Chip timing
- Enter online
- Event village
- Rural
- Age 18 & over
- 1.2 miles lake swimming
- 67 miles road cycling
- 14 miles trail running
- Sun 20 Jul
- 1 charity
- Sun 20 Jul
- 1 charity
TriBourne Festival of Endurance | Middle Distance Triathlon
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
- Sun 20 Jul
- £245-£295
- Sun 20 Jul
- £245-£295
Belvoir Castle | Gauntlet Triathlon
A jewel in the castle crown! Get active in the beautiful grounds and surrounding area of stunning Leicestershire in the epic Gauntlet Triathlon! Celebrate in the festival village afterwards.
- Chip timing
- Enter online
- Age 18 & over
- 1.9 km lake swimming
- 90 km road cycling + 957 ft ascent
- 21 km road running
- Sun 3 Aug
- £224.99-£249.99
- Sun 3 Aug
- £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
- 95.6 km road cycling + 5045 ft ascent
- 21.2 km multi terrain running + 2926 ft ascent
- Sun 31 Aug
- £140
- Sun 31 Aug
- £140
Roadford Lake Triathlon | Middle Distance
Now twice-yearly due to popularity, the 70.3 Tri has 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
- Age 18 & over
- 1.9 km lake swimming
- 93 km road cycling
- 21 km road running
- Sat 6 Sep
- £240-£260
- Sat 6 Sep
- £240-£260
THE ROC ENGLAND
Face up to the mountain in one of Europe's most inspiring locations. From Windermere to Coniston to summit England's highest mountain, if you love a tough and rewarding challenge - you'll thrive.
- 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
- £160-£180
- Sun 21 Sep
- £160-£180
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
- Sun 28 Sep
- £245-£295
- Sun 28 Sep
- £245-£295
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
- 21 km road running
- Sat 4 Oct
- £240-£260
- Sat 4 Oct
- £240-£260
THE ROC SCOTLAND
THE ROC takes in the Highlands. Kinlochleven to the summit of Ben Nevis and back, including a Loch swim, stunning mountain/gravel bike sections and the UK's highest mountain!
- 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 9 May 2026
- £195-£225
- 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 17 May 2026
- £135
- 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
- 20 km road running
- Sun 29 Jun
The Northumbrian | Half Iron Distance
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles trail running
- Sun 29 Jun
Ullswater Epicman Triathlon & Duathlon | Triathlon - Middle Distance
- 1900 m lake swimming
- 90 km road cycling
- 21 km road running
- Sun 29 Jun
Ultimate Half Triathlon
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles road running
- Sun 6 Jul
Outlaw Half Holkham Weekend | Outlaw Half Holkham
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles road running
- Sun 20 Jul
On The Edge Middle Distance Triathlon
- 1.2 miles pool swimming
- 56 miles road cycling
- 13.1 miles road running
- Sat 23 Aug
THE RESTLESS Gravel XTRI
- 1.8 km lake swimming
- 50 km gravel riding
- 25 km xc running
- Fri 29 - Sun 31 Aug
Half Long Course Weekend
- 1.2 miles lake swimming
- 56 miles road cycling
- 13.1 miles road running
- Fri 29 - Sun 31 Aug
Junior Long Course Weekend
- 1.2 miles lake swimming
- 56 miles road cycling
- 10 km road running
- Sun 31 Aug
Shropshire Triathlon | Middle Distance and Relay
- 2 km lake swimming
- 78 km road cycling
- 20 km road running
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