Analysis of participation and performance in athletes by age group in ultramarathons of more than 200 km in length So far, the performance of the so-called, Master Runner ‘was examined in ultra ripenes of a maximum of 100 miles. We have now studied what the runners create> 35 years on the ‘Badwater’ and on the ‘Sparatathlon’.In both runs, the top runners were 40-45 years old. While at ‘Badwater’ the men in the age groups 30-34, 35-39, 40-44 and 55-59 could improve their performance, the age group runners at the Spartatthlon ‘were unable to improve. The whole work can be found under https://pubmed.ncbi.nlm.nih.gov/23589700/