International Association of Ultrarunners
# International Association of Ultrarunners

The International Association of Ultrarunners (IAU) is the world governing body of ultra running, race events longer than the marathon distance of 42.2 km. It regulates and sanctions the World Championships for various ultramarathon distances, and tracks world records in ultra distance races approved by IAU. IAU operates under the patronage of the World Athletics and follows World Athletics rules.

## Events

IAU events include:

| Event | Frequency | First Year |
| - | - | - |
| World Events |||
| IAU 50 km World Championships | Annual | 2015 |
| IAU 100 km World Championships | Annual | 1987 |
| IAU 24 Hour World Championship | Annual | 2001 (and 1990) |
| IAU Trail World Championships | Annual | 2007 |
| Regional Events |||
| IAU 50 km European Championships | Annual | 2015 |
| IAU 100 km European Championships | Annual | 1992 |
| IAU 24 Hour European Championships | Annual | 1992 |
| IAU 100 km Asian Championships | Biennial | 2010 |
| IAU 100 km Americas Championships | Biennial | 2017 |
