From the centre of Forstau, head south towards Forstau-Winkl. The first 4 km are on asphalt, then about 7 km are gravel roads, always slightly uphill, to the alpine huts Fallhausalm or Vögeialm.
From there an "intensive" mountain bike tour begins up to the Oberhüttensee with the Oberhütte (1.860m), where you deserve a refreshment! On the way back, be careful when driving downhill!