Half Ironman (middle distance) in UK

• Sat 9 May 2026
• £250-£270

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

• Sat 16 - Sun 17 May 2026
• £165-£170

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 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 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 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 21 Jun 2026
• £196-£245

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 18 Jul 2026
• £260-£290
• Early bird

Castle To Coast Triathlon

A one-of-a-kind triathlon adventure from castle to coast – swim, bike, run and soak up the best of the North and South Downs, fully supported all the way, no navigation needed!

Early bird on now

• Newcomers
• Chip timing
• Enter online
• Event village
• Rural
• Age 18 & over

• 1.2 miles lake swimming
• 66 miles road cycling + 3300 ft ascent
• 14 miles trail running + 1300 ft ascent

• Sun 19 Jul 2026
• £196-£245

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

• Sat 8 Aug 2026
• £130-£150

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 + 1686 ft ascent
• 21.1 km road running

• Sat 5 Sep 2026
• £215-£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

• Sat 3 Oct 2026
• £215-£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 km lake swimming
• 52 km mountain biking
• 18 km multi terrain running