Magnus Ditlev Sets World Record at IRONMAN Florida

Denmark’s Magnus Ditlev bounced back from a tough day at the IRONMAN World Championship with an incredible race at IRONMAN Florida today, setting a new world best with his 7:19:17 finishing time. In the women’s race, Switzerland’s Alanis Siffert nailed her spot for a first appearance in Kona next October.

Ditlev’s time becomes the fastest ever IRONMAN time (previously Kristian Blummenfelt’s 7:21:12 at IRONMAN Cozumel), and eclipses the world-best time set by Sam Laidlow (7:21:04) at Challenge Roth earlier this year.

Ditlev set the stage for his breakthrough performance with a solid swim – Great Britain’s Andrew Horsfall-Turner was first out of the water in 47:42, with another Dane, Emil Holm and American Ben Kanute coming out a few seconds later. Ditlev would follow just 10 seconds back of the lead, setting the stage for a dominant performance on the bike.

By the time he hit the halfway point Ditlev was over six minutes up on a group that included Rudy Von Berg and Kanute, while another couple of Americans, Justin Metzler and Sam Long were sitting in eighth and ninth, a shade over seven and eight minutes back respectively.

As Long eventually rode his way into second place, Ditlev would continue to pull away from the rest of the field, hitting T2 with a lead of over 11 minutes on Long, Von Berg and Kanute. Ditlev’s 3:51:16 bike split is also another full-distance best time, beating Cameron Wurf’s 3:53:32 set at IRONMAN Texas in 2025.

While his run wasn’t as impressive as the bike, Ditlev stormed through the marathon in 2:33:31 to gain even more time on the men behind, eventually winning by over 14 minutes.

Long and Von Berg would run together through the halfway point of the run, at which point Von Berg started to pull ahead. Like Ditlev, Von Berg had suffered in Kona and pulled out, while Long had finished an impressive sixth. Whether it was determination to redeem himself, or fresher legs, Von Berg would put together a strong run to nail second.

The big mover in the marathon was American Matt Hanson, who put together yet another sub-2:30 marathon split (2:28:07) to power past Long and round out the podium and presumably take the last of the three Kona qualifying spots.

Siffert Cruises to Kona Qualification

Heading into today’s race Swiss star Alanis Siffert was the prohibitive favourite, and she lived up to that billing with a dominant performance, remaining near the front of the race throughout the day before dominating the marathon.

Siffert led the women out of the water alongside Brit Holly Lawrence, at which point the pair continued to dominate, pulling away from the rest of the field. They were almost four minutes ahead of Lawrence’s countrywoman Megan McDonald out of the water, and by the halfway point of the bike the pair were over 12 minutes up on McDonald and Germany’s Laura Janson. Lawrence would eventually pull clear of Siffert on the bike, hitting T2 with lead of just under two minutes, with Janson and McDonald arriving a shade under 19-minutes back.

It took Siffert less than four miles to close the gap and move into the lead, and from there the Challenge Roth champion cruised clear to shatter Sky Moench’s course record of 8:22:28 set in 2023 with her 8:07:37 finish time. That time is the fourth-fastest full-distance time ever, and now makes her the fastest Swiss athlete over the distance ahead of Daniela Ryf (8:08:21 at Challenge Roth in 2023).

After her impressive win at Challenge Roth earlier this year, followed by her podium finish at the 70.3 worlds in Nice, Siffert sets the stage for an impressive Kona debut.

Lawrence would bounce back from injury with a runner-up finish and earning her Kona slot, with Jansen rounding out the podium and the Kona qualification.

(We will update the list with the entire top 10 once they have finished.)

Record Setting Day

In addition to Ditlev’s world best, there were a number of course records set in Florida today:

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