Head east through the forest after leaving the car park at the bathing lake. After crossing a small bridge, follow the signs for Mühlhof, along an asphalt road on the forest's edge until you reach a chapel at a fork. Continue a little further through the forest and you've reached your destination.
A lovely variation for the return is to go via Plateaublick. From here, follow the signs towards Untermieming and back to the bathing lake.