Iron-distance races: the 11 toughest?

Make no mistake all 11 of these Ironman distance triathlons are tough and not for the faint-hearted, but which is the toughest long-distance race of all? We crunch some stats to find out...

02) Altriman, Pyrenees, France: Tough Score 88/100

Five thousand metres of elevation on the bike? A 25% DNF rate? Holy moly! Time assess the Pyrenees-set Altriman in our iron analysis…

 “I toed the line at Altriman in 2012 as a pretty experienced long-distance athlete. But at Altriman I spent nearly twice the time on the bike than I did at Challenge Roth,  said Christophe Fernandez, multiple Altriman finisher.

"Nothing prepares you to spend 10hrs on the saddle and to tackle those 5,000m of climbing on this continuous up and down loop. On the marathon, I was on my knees at the start of the first gradient (yes, the run is hilly too). My race was over… I came back in 2013 for this unfinished business and, after 15:19hrs of battle, I finally grabbed the finisher fleece of which I’m so proud!”


Continue reading our guide to the 11 toughest irons  (10/11)


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You've missed Swissman,

Arguably harder than Norseman at the least.


There's probably a typo for the Lanza swim temp. 29C is far from reality! Maybe 19C at best.


Don't forget the new one on the other side of the pond, Project DM


Take a look at /

That's a new tough one.


Agree wietcth TuckandGo with Swissman. And what about Altriman, Stonemanx Xtri (ambleside).... etc

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