Focused on ultrarunning events, we'll provide you with up to date information on upcoming races, results, and other ultrarunning news and ... despite our name, you do not have to complete a 100km race... that will come in time!

Founded in 1980, the Association counts amongst it's members many leading UK ultra distance runners - past and present.

Read more about how we started....

Runners of all ages and abilities are welcome - it's just a matter of wanting to achieve (what some people may think the impossible!)

This is the new website for the 100km Association.... so if you are a member do send in your race results and reports, or, if you would like to know more or join the 100km Association, then ...