Completing a Half Ironman is a real feat of endurance but is do-able if you are willing to put in the training time. Also called a 70.3 triathlon or middle distance triathlon, these long-distance events involve a 1.2-mile swim (1.9km), a 56-mile bike ride (90km), and a 13.1-mile run (21.1km) - a total of 70.3 miles completed in an average of around 6 hours. Select your location for 70.3 triathlons in your area or scroll down to see major events coming up.
Featured events are listed below - select your region to see all events.
Race through the beautiful grounds of stunning Belvoir Castle out into surrounding Leicestershire in a 'half ironman' distance triathlon then celebrate with friends and family in the festival village.
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!
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!
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.
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.
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.
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.
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!
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.
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.
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.
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.
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.
Racing through the hills Kielder Forest and on hard-packed trails around the lake, this half distance triathlon is a serious test of endurance.
Select your location for Half Ironman and 70.3 triathlons in your area.