Kristian Blummenfelt and Gustav Iden reveal 2025 race schedule and make big IRONMAN vs T100 decision

Norwegian superstars Kristian Blummenfelt and Gustav Iden have confirmed they will go all in on the IRONMAN Pro Series in 2025.

Blummenfelt’s main initial aim this year was the Paris 2024 Olympics, but he then won in superb fashion on his full-distance return at IRONMAN Frankfurt only to suffer at Kona when battled hard to finish the IRONMAN World Championship in 35th place.

Iden too had a tough time in Hawaii, with a DNF on the run, but the pair each have an IMWC title to their name and have also won three of the last four IRONMAN 70.3 World Championships.

They’ve also excelled in PTO races in recent years – Iden leading a one-two at the Canadian Open in 2022, while Blummenfelt won the Singapore Open last year en route to topping the PTO world rankings for a second season in a row.

So there had been speculation that they could be involved in the T100 next season but that now appears to be off the agenda, bar the odd wildcard.

It’s a potential blow for T100 who have lost another of their biggest draws on the men’s side for 2025 with this week’s news that double Olympic champion Alistair Brownlee, third in the T100 Grand Final in Dubai last week, has now retired.

But it underlines that there will likely be much more of a clear split in terms of which series the top athletes race rather than trying to combine both – as the likes of Kat Matthews and Magnus Ditlev have done to great effect in 20