The mountain group covers an area of about 30 by 30km and forms the transition from the pre-alps in the Danube region to the higher peaks of the Mürzsteg Alps, which mostly lie in Upper Styria. The mountains reach a height of 1,400m in the Großer Sulzberg, and have several other peaks over 1,350m. The best-known peaks are:
The valleys of the Türnitz and Traisen have steep mountainous sides and there is little room for settlements. The water quality is high. Summits are largely forested. Only well-known tourist destinations, like the Eibl and Tirolerkogel, have large areas of Alpine pasture (Almen).