Olympus Mons the height of Mauna Kea as measured from its base on the ocean floor). The total elevation change from the plains of Amazonis Planitia, over to the northwest, to the summit approaches . The summit of the mountain has six nested calderas (collapsed craters) forming an irregular depression × across and up to deep. The volcano's outer edge consists of an escarpment, or cliff, up to tall (although obscured by lava flows in places), a feature unique among the shield volcanoes of Mars. Olympus Mons covers an area of about , which is approximately the size of Italy, and it
Olympus Mountain Running run. From a boat the competition starts, the swimming ends at the beach of Platamonas. The route depends on the wind direction, the athletes are accompanied by boats. From Platamonas, the Olymp is almost completely rounded. The cycle race takes place on paved roads, 4100 vertical meters have to be overcome. Target is the place Vrisopoules. From Vrisopoules, the route leads over the second highest peak of the mountains (Skolio, 2911 m) on forest roads down to the river Orlias, which is the destination of the triathlon. There are 2250 vertical meters to overcome. Olympus Mountain Running Since 1986, nearly