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.
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?
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.