Linear walk from Gerlos to Zell am Ziller. Early bus from Mayrhofen. Bright sunny day. Up the lift at Gerlos, then walk up to summit of Isskogel. Good views all around, walked down to small reservoir, then up onto long rocky ridge, with fixed cables in places, to summit of Kreuzjoch 2558m. Descend 1000m to Rosenalm, then down to Zell and bus back to Mayrhofen.