The race takes place annually on the first weekend in July and covers a distance of about 100 kilometers, with 6410 meters of altitude to overcome. Until 2017 it started in the park at the church Agios Joannis, above Litochoro. From 2018, the start and finish were moved to Lakko, on the Enipeas River in Litochoro. The offer is aimed at experienced runners; a medical certificate is not required, but proof of the participant's experience of difficult routes. Greek runners must have completed a number of races within the last three years, foreigners must have completed at least one 80 kilometer run during this period. About 90% of the route is forest trails and mountain trails. This extreme run takes place partly on the Thessalian side of the Olympus and is limited to 28 hours. The runners cross the third highest peak of Mount Olympus, the Skolio (2,910 m).