Book online tickets of marathon races in Delhi, Half Marathon, Women Run, Fun Run, Kids Run and upcoming marathon races in Delhi. A marathon is a long distance edition of running and is classified based on the distance. There are a number of altered marathons which you can run. The traditional marathon distance is 26.2 miles, while the half marathon distance is 13.1 miles. Running a marathon has gained a lot of attractiveness in the last couple of years. The credit goes to a lot of celebrities endorsing marathons and a rise in awareness when it comes to the advantages of running. Nowadays a lot of youngsters are reaching inclined towards running as a way of life.