Gosaulacke is the smallest and most changeable of the three Gosau lakes, lying between Vorderer Gosausee and Hinterer Gosausee on the hiking route into the Dachstein massif. Unlike the two larger lakes, it is not a permanent body of water with a stable shoreline. Official Dachstein Salzkammergut tourism describes it as a small lake fed by minor tributaries that fills significantly when snowmelt, heavy rain or overflow from Hinterer Gosausee sends more water through the valley. Open mapping classifies it as intermittent, and Austrian mapping data places it at roughly 966–969 metres elevation. This seasonal behavior is the key to understanding the place. Travellers should not expect to find the same lake volume in every month or after every weather pattern. Sometimes it appears as a distinct shallow lake; at other times the basin is much less full and reveals more of the valley floor.
The location is part of the attraction. Gosaulacke sits beneath the high walls and peaks of the Dachstein and Gosaukamm landscape, on the route that continues from Vorderer Gosausee toward Hinterer Gosausee. Tourism material recommends the full sequence of the Gosau lakes as a mountain walk and estimates about one and a half hours from Vorderer Gosausee to Hinterer Gosausee, with Gosaulacke encountered along the way. A separate official route description places the pond after the Niedere Holzmeisteralm and before the climb toward Luegbichl and Hinterer Gosausee. Gosaulacke therefore functions less as a stand-alone roadside attraction than as a changing natural episode inside a longer valley walk.
Its hydrology explains why the scenery can change quickly. Hinterer Gosausee has an underground outflow under normal conditions, but when water levels rise enough, overflow can feed the lower basin around Gosaulacke. Snowmelt and heavy precipitation add to that effect. Because the lake is intermittent, exposed ground, wet meadow, shallow water and fuller lake conditions are all legitimate versions of the same place. This variability makes Gosaulacke particularly interesting for travellers who want to see mountain water systems as dynamic rather than static. It also means that photographs from another season should never be treated as a guarantee of current appearance.
Access is on foot. The normal starting point is the Vorderer Gosausee area, reached by road, paid parking and regional buses 541/542 from the Gosau and Steeg-Gosau direction. From there the route continues along the Gosau lakes. On 4 September 2026, an important temporary restriction applies: because of rockfall after heavy rain, the left side of Vorderer Gosausee is closed through 30 September 2026, and the route toward Hinterer Gosausee is accessible only from the right side of the lake. That current safety notice affects anyone walking to Gosaulacke as well. It should be treated as temporary and rechecked before travel rather than copied as a permanent route description.
Gosaulacke has no ticket, gate, staffed hours or visitor infrastructure of its own. It is an open mountain landscape whose practical “hours” depend on safe hiking conditions, daylight, snow and temporary closures. The approach is not a step-free attraction, and there is no guarantee that the basin itself will contain much water. Those limitations do not weaken the destination; they define it. Gosaulacke is valuable precisely because it shows the Gosau lake system in motion. Plan it as part of a walk, carry suitable footwear and weather protection, obey closure notices and allow enough time to continue to Hinterer Gosausee if conditions permit.
The lake’s very instability also makes it a useful counterpoint to the famous lower Gosausee. Vorderer Gosausee is photographed as a fixed landmark and managed partly as a reservoir, while Gosaulacke can expand and contract dramatically. The contrast reminds visitors that “the Gosau lakes” are not three equivalent scenic basins. Each behaves differently because elevation, geology, drainage and human use differ. Seeing Gosaulacke in a low-water state can therefore be just as informative as encountering it full, especially when the exposed basin reveals channels and terrain normally hidden beneath water.
For many hikers, that uncertainty becomes the main reason to stop and look carefully rather than simply pass through.
It is a small place, but its changing water level makes it unusually revealing.
That variability gives the stop unusual ecological and visual interest for attentive hikers.
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