Claudia Müller (Austria, 54, IISA bio here, @claudia.guenter) started out in the extreme sports world as a triathlete – finishing Ironman Triathlons in Frankfurt, France Nizza, Regensburg, Switzerland, and Kärnten Austria between 11 hours 19 minutes and 13 hours 14 minutes during the years between 2008 and 2013.

Müller took up ice swimming in 2020 and has since completed the following Ice Kilometers and Ice Miles:

• ÖM Altenwörth 2020 in 23 minutes 40.70 seconds
• Hallstättersee 2022 in 20 minutes 39.56 seconds
• ÖM Altenwörth 2023 in 20 minutes 48.90 seconds
• Hallstättersee 2023 in 21 minutes 18.6 seconds
• IISA EM Oradea 2024 in 20 minutes 56.3 seconds
• Hallstättersee 2024 in 19 minutes 41.83 seconds
• Hatfield Lake Doncaster, 35 minute 1 second Ice Mile in 4.3°C water and 4.5°C air to become an Iron Icewoman

Now she is continuing to step up in the Ice – while also returning to the triathlon world at the age of 54.

On September 1st – 3rd 2023 in Bad Radkersburg, Styria, Austria, she completed a Triple Ironman Triathlon in a cumulative time of 54 hours 29 minutes 5 seconds. She also competed in several events this year, including competing in several events at the IISA 6th World Championship in Molveno, Italy, finishing the Ice Kilometer in 21 minutes 11.93 seconds in the 1.94°C pool water, and completed her second Ice Mile in April 2025 in Achensee, Achenkirch, Austria in 4.90°C water and 0.00°C air temperatures.

Later this year, she plans to complete yet another Ironman Triathlon and attempt yet another Ice Mile – which would enable Müller to become the first Triple Ice Ironwoman in history.

A Triple Ice Ironwoman is an woman who has completed three separate full Ironman triathlons and three separate Ice Miles, enabling her to become an Iron Icewoman three times over.

Stay tuned.

Iron Icewomen

• Kellie Joyce Latimer‪ (USA) in December 2014
• ‪Jaimie Monahan‪ (USA) in April 2016
• Claire Bustin-Mulkern‪ (UK) in January 2017
• ‪Conny Prasser‪ (Germany) in January 2017
• Corinna Nolan (Ireland) in February 2018
• Elina Mäkinen (Finland) in August 2018
• Sophia Nash (Scotland) in January 2019
• Erin Churchill (USA) in December 2019
• Claudia Müller (Austria) in January 2020
• Hanna Bakuniak (Poland) in August 2020
• Cindy Hughes (USA) in November 2020
• Anja Binder (Germany) in August 2021
• Qing Li (USA) in December 2021 (achieved within 29 days)
• Kaetlyn Taylor (USA) in March 2022
• Trisha Harvey (Scotland) in December 2022
• Angela Wood (England) in December 2022
• Madina Kurmanbaeva (Kazakhstan) in January 2023
• Gerda Holla (Netherlands) in September 2023
• Adele Havercroft (England) in January 2024
• Makala Jones (Wales) in February 2025
• Claudia Müller (Austria) in April 2025 [second Iron Icewoman achievement]

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