After taking the train to Lauterbrunnen, transfer to the cable car to the town of Mirren. It seems that you have to get off at Grutchalp station in the middle, and then take the small train to the town of Mirren. From here, you can also go to the snowy Langfeng. We saw some cyclists, transporting their bikes up the hill, estimated to be preparing to ride from Mylan.