An Ironman or full distance triathlon is one of the toughest event formats around and only do-able by the most committed athletes with both the physical and mental endurance to cross the finish line. Also called a 140.6 triathlon or full distance triathlon, these long-distance events involve a 2.4-mile swim (3.9km), a 112-mile bike ride (180km), and a 26.2-mile run (42.2km) - a total of 140.6 miles completed in an average of around 10-15 hours. Select your location for full distance 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.
Join this exhilarating Endurance Weekend in the stunning Chiltern Hills! Whether you seek a weekend of endurance, picturesque sights or a chance to bond with fellow athletes, this is your opportunity!
Full Iron Triathlon distance with 4 laps in the famous Kielder Water, a cycle into the Scottish Lowlands then an off-road trail run along forest trails. It's a huge challenge on the legs!
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 marathon around the beautiful town of St Neots.
Welcome to the biggest multisport festival in Europe, The Long Course Weekend.
The UK Ultimate Triathlon is like it says, the ultimate triathlon challenge.
The original Outlaw! Outlaw Nottingham Weekend hosts the award-winning long-distance event, Outlaw Nottingham, affectionately known as “the Full.”
Do you have what it takes to be a GEORDIEMAN?
Get ready for the first edition of Long Course Weekend Yorkshire.
Take on one of the World’s Toughest Triathlons…
Take on one of the World’s Toughest Triathlons…
Select your location for Ironman and 140.6 triathlons in your area.