Explanation
The Renon/Ritten earth pyramids are a phenomenon caused by erosion, appearing where ice age moraine loam from glaciers collected in the valleys. When dry, the material is as hard as rock but, combined with water, it becomes a clay-like mush which flows into the valley. It remains protected from the rain under large stones so that columns of earth are built up becoming taller after each rainstorm.
Route: the hike begins in Collalbo/Klobenstein, the main village on the Corno del Renon mountain. The trail leads through Collalbo to Longomoso/Lengmoos until to the hiking trail no 24 in the Erdpyramidental valley, which is so flat that it can be walked with any sort of shoe and with a buggy. View the earth pyramids against the backdrop of the imposing Dolomites from the viewing terraces. Return via the same route, through Longomoso to the beginning of trail no. 37, the von-Eyrl Promenade and the starting point at the railway station in Collalbo.
Tip: the easy way to get from Bolzano/Bozen to Collalbo is on the Rittner Seilbahn cable car and Rittner Bahn narrow-gauge railway.
Derived from the technical difficulty and the stamina requirements.
Getting there from Bolzano/Bozen:
By car: from Munich in approximately 3,5 hours via the motorway (Rosenheim-Kufstein-Innsbruck-Brenner) until you come to the motorway exitz Bolzano/Bozen NORD. Take this exit, drive in the direction of Bolzano and toward the Renon/Ritten mountain.
By train: On the Munich-Innsbruck_Verona line to Bolzano wehre alal trains stop. Bus stop near the train station, whrere buses 165 go to Collalbo/Renon. Or walk 10 minutes to the start of ropeways to Soprabolzano/Renon. The ropeway goes in only 12 minutes to Soprabolzano/Renon. There starts the Renon railway every half hour and after 18 minutes you arrive to Collalbo/Renon.