biathlon, where the athletes run and bike. Organizer E.O.S. Thessaloniki The first organizer of marathons in Greek mountains was the E.O.S. Thessaloniki (Greek Ελληνικός Ορειβατικός Σύλλογος Θεσσαλονίκης, Greek mountaineering club Thessaloniki). Since 1986, the marathon (mountaineer marathon of Olympus, Ορειβατικός Μαραθώνιος Ολύμπου) with only one interruption, annually on the first Sunday in September is organized. Patronage of the event has taken over the community Dion Olympou. In 2018, around 300 runners took part in the competition, of which 249 had finished the race in accordance with the regulations. Running track Start at the mountain hut Stavros, altitude 920 m 4 km to the junction Gortsia, altitude 1125 m 6 km to the refuge Petrostrounga, altitude 1940 m 3.2 km to Skourta, altitude 2420 m, also named after the mountain climber Voula Nikitidou, who had a fatal accident in the Olympus. 3.1 km to the refuge Christos Kakkalos, altitude 2648 m (named after the first climber of Mytikas, with 2918 m the highest peak of Mount Olympus) 5.1 km below and along the summits Mytikas and Stefani to the hut Spilios Agapitos, altitude 2085 m. 6.55 km to Prionia, altitude 1100 m 3 km to the chapel of Agios Dionysios, altitude 800 m 2.35 km to Koromilies, altitude 650 m 3 km to Sara, altitude 495 m 1.35 km to Portes, altitude 630 m 4.15 km to the finish at the central park of Litochoro, near the Nautical Museum, altitude 295 m The overall length of this running track is about 41.85 kilometers. Organizer Olympus Marathon The Olympus Marathon, the Olympus Ultra and the Olympus Vertical take place on the last weekend of June. These events are supported by the Ministry of Economy, Development and Tourism, the prefecture of Pieria and the municipality of Dion-Olympos. In 2018, around 800 runners from 25 countries took part in the competition. The three races, Olympus Marathon, Olympus Ultra and Olympus Vertikal are a part of the Skyrunner World Series. Running track Start in Dion, altitude 3 m 4 km to Agios Konstantinos, altitude 180 m 4.5 km to Orlias, altitude 740 m 2 km to Koromilia, altitude 1000 m 2 km to Bara, altitude 1350 m 2.8 km to the refuge Petrostrounga, altitude 1940 m 2.4 km to Skourta, altitude 2420 m 3.1 km to the Muses Plateau (Oropedio Mouson), altitude ca. 2600 m 4.2 km to the hut Spilios Agapitos, altitude 2085 m