The Rietzer Grießkogel (also: Grieskogel) is a mountain, m (AA), and the highest peak in the Northern Sellrain Mountains, part of the Stubai Alps in the Austrian state of Tyrol. The summit is easily climbed on path no. 153. The first documented ascent was undertaken in 1829 by Innsbruck botanist, Andrä Sauter, a brother of Anton Sauter. As a result of its easy accessibility on well marked paths from Telfs in the Inn Valley and from the Sellrain Valley, it is a popular destination. Its name is derived from the village of Rietz at its northern foot in the district of Imst in the upper Inn valley.