Grünstein, Mountain summit in Bavaria, Germany

Grünstein is a mountain summit in Bavaria that forms part of the Watzmann range within the Berchtesgaden Alps. The peak stands at 1,304 meters and is accessible via marked hiking routes of moderate difficulty.

The Grünstein's documented climbing history began on 21 June 2009, when construction of its first via ferrata started; it was finished eight weeks later and named the Isidor-Klettersteig after Isidor Grassl, leading to the summit at difficulty C. A harder D/E variant with a suspension bridge followed, then the Räuberleiter in 2011 and the overhanging Intersport-Renoth Gipfelwand in 2013.

The Grünsteinhütte at 1,220 m is a managed hut on the standard route, and the summit's first climbing route, the Isidor-Klettersteig, was built in eight weeks from 21 June 2009 and named after Isidor Grassl. It climbs to the top at difficulty C, with a D/E variant reached over a suspension bridge.

The mountain is reached via clearly marked hiking paths that guide visitors to the summit. A mountain shelter called Grünsteinhütte sits near the peak and provides rest and refreshment for hikers.

Near the summit stood one of six pseudolite transmitters of the GATE test environment, built to simulate Galileo navigation satellites for the European satellite system. The first climbing route, the Isidor-Klettersteig, was built in eight weeks from 21 June 2009 and named after Isidor Grassl; a suspension bridge links it to the harder D/E variant.