Half Ironman (middle distance) in UK in Summer

• Sun 7 Jun
• £166-£187

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.

• 1900 m lake swimming
• 90 km road cycling + 1680 ft ascent
• 21 km multi terrain running

• Sun 14 Jun
• £239.99-£259.99

Slateman Legend (70.3) Triathlon

The most iconic multi-sport adventure race in Wales, combining a lake swim, brutal mountain climbs and a demanding run through Snowdonia’s dramatic, awe-inspiring landscape over a Middle distance tri.

• 1900 m lake swimming
• 92.6 km road cycling + 4297 ft ascent
• 23.1 km trail running + 2723 ft ascent

• Sun 14 Jun
• £155-£195

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.

• 1900 m sea swimming
• 90 km road cycling + 2501 ft ascent
• 21 km multi terrain running + 259 ft ascent

• Sun 14 Jun
• £130

Plymouth Middle Distance Triathlon

Dive into the Plymouth Middle Distance Triathlon! A stunning sea swim, scenic coastal bike ride, and flat waterfront run offering an unforgettable multisport challenge for athletes of all abilities.

• 1900 m sea swimming
• 90 km road cycling + 4545 ft ascent
• 20 km trail running + 1620 ft ascent

• Sun 5 Jul
• £155-£175

ATW Odyssey At Box End Triathlon | Half Distance Triathlon

Get ready for one of the UK’s most exciting Half Iron triathlons of the year! Dive into crystal-clear lake waters, then ride a smooth, rolling bike course and follow scenic on-site run paths.

• 2250 m lake swimming
• 96 km road cycling + 1732 ft ascent
• 20 km road running + 351 ft ascent

• Sat 18 Jul
• £265-£293
• 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

• 1.2 miles lake swimming
• 66 miles road cycling + 3550 ft ascent
• 14 miles trail running + 1512 ft ascent

• Sun 26 Jul
• £239.99-£259.99

Snowman Legend Triathlon

Cold-water swim, relentless mountain climbs and a brutal trail run through Snowdonia — this ultimate endurance challenge demands grit, resilience and rewards you with unforgettable views.

• 1900 m lake swimming
• 95.6 km road cycling + 5045 ft ascent
• 21.2 km multi terrain running + 2926 ft ascent

• Sat 8 Aug
• £145-£165

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.

• 1900 m river swimming
• 90 km road cycling + 1680 ft ascent
• 21.1 km road running

• Sat 8 Aug
• £145-£165

ATW First To Full Triathlon Festival | Half Distance Triathlon

Be part of a UK first. This isn’t just a Half Iron triathlon - it’s the first event of its kind where you decide the distance, from sprint to full, and race your way.

• 1900 m river swimming
• 90 km road cycling + 1686 ft ascent
• 21.1 km road running

• Sat 22 Aug
• £250

THE RESTLESS Gravel XTRI

Take on a wild Scottish adventure combining a cold-water loch swim, epic gravel ride and tough mountain run through the breathtaking landscape of the Arrochar Alps.

• 1.8 km lake swimming
• 50 km gravel riding + 2000 m ascent
• 25 km fell running + 1200 m ascent

• Sun 30 Aug
• £140

Wimbleball Middle Distance Triathlon

A superb triathlon venue which hosted Ironman 70.3 for ten years! Experience dramatic hills, pristine open water and wild Exmoor scenery in a tough, rewarding Middle Distance Triathlon.

• 1900 m lake swimming
• 92 km road cycling + 5381 ft ascent
• 21 km road running + 1508 ft ascent