Parking lot below the Fellhornbahn valley station, Oberstdorf Faistenoy. NOT Fellhornbahn car park. Free of charge.
From the car park follow the path into the valley. First through Anatswald and Birgsau to the bus turnboard, from there you can usually start to strap in.
Follow the path along the Stillach and later the Rappelalpenbach for about 10 km to the Schwarzer Hütte. Most of the time, there is no need to track here at least until the game feed just before the Schwarzer Hütte.
At the Schwarzer Hütte, turn left and follow the signs to Rapenseehütte into the forest. At first, ascend quite steeply through the forest until the path leads out of the forest and over an open stretch to the middle Rappenalpe.
Pass it and continue uphill. At the bottom left the Enzianhütte becomes visible. Leave it on the left and traverse to the right over a steep part. Take off your skis and hit the stairs with the boots if necessary. This is a bit of a difficult spot in bad conditions, but then you reach easier terrain again. Follow the signpost to the left. After a while you will see the summit cross, which is located slightly above almost next to the Rappensee hut (about five minutes on foot). The entrance to the winter room can be reached from behind in the left building.
Like ascent. If the conditions are very good, you may be able to use the gully at the bottom of the forest to the right of the ascent route (not tried yet!).