It is a common place nowadays that trail running, as well as ultra trail races, meet a growing development world – wide much as it happens in our country. During 2014, the Trail Races in the Greek mountains surpassed the number of 100 with many new events trying to attract the attention of athletes and others having already left their trademark through years and being already characterized as “Classic” races in the community of the people involved in this sport. Such examples abroad are the Western States and the UTMB and in our country are the Olympus Marathon, the Rodopi Advedurun and Spartathlon in the category of Ultra Road races.