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 New 100 km World Record ratified by IAAF

On September 14th, IAAF ratified the men 100 km World Record 6:09:14 achieved by Nao Kazami (JPN) in Kitami City on 24 June 2018. The previous record 6:13:33 was set by Takahiro Sunada (JPN) on June 21st, 1998 during the same race. The record sustained for 20 years. 

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Career Awards during 2018 IAU Congress
This career award has been established since 2014 to recognize for tireless ultrarunning enthusiasts who have worked long and hard to increase the profile of national and international ultrarunning. This prestigious honour recognizes the hard work and dedication in developing and promoting the sport over the years. We are committed to honouring the individuals who have paved the way of the sport for the future. > more
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RUN Winschoten IAU

2020 100K World Championships
12th September 2020, Winschoten, The Netherlands

2019 24H World Championships
Irdning has been candelled
IAU Mirandha do Corvo, Portugal

2019 50K World Championships
1th September 2019, Brasov, Romania

2019 TRAIL World Championships
June 8th 2019, Mirandha do Corvo, Portugal

Trailer 2018 WC Trail Penyagolosa  


9/1/2018 6H Italy Road
6 ore di Teodorico

9/2/2018 50km Italy Trail

9/2/2018 43,5 km Italy Road
Ultramaratona delle Fiabe

>> Go to the calendar

The International Association of Ultrarunners (IAU) is operating under the patronage of the IAAF and is dedicated to develop ultradistance running internationally within the IAAF Rules & Regulations.

As international governing body for ultradistance running, one of our main objectives is to promote and develop long distance running worldwide by encouraging specific activities in each of the IAAF Continental Areas.

The 100 km is our “flagship” since the IAAF officially sanctions this distance and also ratifies 100 km world records.

The major IAU competitions are :
100 km World Championships under the patronage of the IAAF
100 km Area Championships
24H World Championships
24H Area Championships
Trail World Championship
50 km World Championship

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