Hike over fairytale-like terrain over the Tschirggen towards Hirschgehrenalpe. You crossed the first stream? Now it goes left up the steep path until it becomes a little flatter again. Just take a short break here, before the path turns left again towards Koblathütte. Please note that the Koblathütte is not managed. Here again follow the left turnoff and a medium-difficult but panoramic hiking trail to the summit of the Geißhorn. The way back is the same.