Starting at parking Winterstube.
Comfy hike on mostly cleared paths.
With snow shoes take the first possible turn left, crossing a small bridge over the Schwarzenbach. Same route is taken by ski tourer. Uphill on the other side until you reach the Skidoospur. On this one left until Buchsteinhütte.
Optional: you can go further on via Roßsteinalm till Hochplatte (1592 m). From there on via Plattel (1505 m) to Schönberg (1620 m). Descend via Marieck and Rauhalm to Schwarzentennalm.
IMPORTANT: Make yourself familiar with the local avalanche situation on the day of the winter hike as this one is only doable in totally secure conditions!
You can sledge down from Buchsteinhütte to the parking!