The south slope of Soininharju is the steepes slope of Hämeenkangas. It is 25 meters high. It has formed at the margin of an west to east trending glacier. The slope has been steepened after the ice age by the waves of the Ancylus sea.
In 1800's there were no forests in the area due to abundant forest fires. This created a heathland where rare species thrived. The area is maintained even today so that heathland habitats survive.
Photo: J. J. Sederholm. 1892. GTK, Vanhatkuvat nro 706.
Nearby attractions: Hämeenkangas, Hämeenkankaan dyynikenttä, Isokeidas mire, Geo-orienteering track of Jämi, History of the airfield of Jämi, The cooking shelter of Koivistonvati, The Koivistonvati kettle hole, The Kuninkaanlähde spring, The little stream starting from the Kuninkaanlähde spring, The Kylmänmyllynlähde spring, Augmented reality sandbox, At the shore of an ancient island, Niiniharju, Border stone, Ruskalaavu or "The Fall Colour Lean-to shelter", Erratic, The Soininharju esker, Sand field on Soininharju, Changing landscape of Soininharju, The viewing tower at Soininharju, The formation of a kettle hole, The Uhrilähde spring, Viheräperänkeidas mire
Coordinates (WGS84): 61.77368, 22.72596