Rietzer Grießkogel, Mountain summit in Northern Sellrain Mountains, Austria

Rietzer Grießkogel is a 2,884 m peak in the Stubai Alps of Tyrol, the highest of the Northern Sellrain Mountains. Its summit is the meeting point of the municipalities of Rietz, Oberhofen im Inntal, Flaurling and Stams. The mountain is built of Ötztal Gneiss, notably biotite-granite gneiss, which weathers easily, so its slopes are less craggy than other Alpine peaks.

Botanist Andrä Sauter from Innsbruck made the first documented ascent of this peak in 1829. This achievement marked an important milestone in Alpine exploration and mountaineering activities in the region during the early 19th century.

The name comes from Rietz, the village in the district of Imst at the mountain's northern foot in the upper Inn valley. The summit is also called Grieskogel. Path no. 153 from the Peter Anich Hut and the ski route up the southwestern flank from Kühtai or Haggen are the routes most used today.

Access is via marked trails, with route 153 starting from Peter Anich Hut and requiring about 3.5 hours of hiking. The path is well-marked, but hikers should be prepared for alpine terrain and changing weather conditions at elevation.

The summit is the meeting point of four municipalities: Rietz, Oberhofen im Inntal, Flaurling and Stams. The rock is biotite-granite gneiss of the Ötztal Gneiss, which weathers easily through frost shattering, so the peaks here are less craggy and easier to climb than other Alpine formations.