Spanning an area of almost 50,000 m², Lake Grünau is the largest of the nine mountain lakes in the Stubai Valley. Located at an altitude of 2,335 m, it is what is known as a cirque lake, the bed of which was also forged by the moraines of the Wilde-Freiger glacier. These long-deserted rock masses date all the way back to the major glacial upheavals that occurred in 1850 and 1920. The lake’s immediate surrounding area is additionally characterised by glacial rock deposits left over by a mass of ice dating back over 10,000 years. Lake Grünau was fed by the “Kleiner Grünau” glacier, which – thanks to its murky glacial mix of water and fine mineral deposits – only served to render the lake’s appearance cloudy. However, since the complete melting of the glacier, the lake’s waters have been restored to their clear and wonderful array of colours. The lake releases its water into the “Freigerbach”, a tributary of the “Sulzenaubach”, which itself flows into the “Grawa-Alm” situated in “Ruetz”. One stage of the “Stubaier Höhenweg” trail runs directly along the banks of the Grünausee Lake, between Sulzenau- and Nürnberger Hütte.
From the parking place Sulzenauhütte, right behind the Grawa Alm the hiking trail leads over a bridge and in a few serpentines uphill through the forest . After about 1 hour you will arrive at the Sulzenaualm . From there, the path takes another hour in serpentines up to the Sulzenau hut. From the Sulzenau hut, the path leads eastwards across several streams up to the Grünausee, the largest lake in the Stubai Alps (about 45 minutes). Passing further clear mountain lakes, head northeast up to the crossing Niederl, the highest point of the round tour. From there, you descend to the Nürnberger Hütte and on to the Bsuachalm. From the Bsuachalm you can reach the parking place of the Nürnbergerhütte (another 30 minutes).
all notes on protected areas
From Innsbruck main station by bus to the stop Neustift im Stubaital - Nürnbergerhütte.
From Innsbruck you can reach the Stubai Valley in about 20 minutes via the Brenner motorway (Europabrücke), exit at Schönberg - continue to Neustift. From there continue towards the Stubai Glacier, the parking place for the Nürnbergerhütte is signposted.
Numerous free parking spaces at the parking place of the Nünberger Hütte.
Arrival by train, car, foot or bike
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