The "Erlebniszug Alp Grüm" (Alp Grüm adventure train) circulated on 8 days in summer 2023 again, between Poschiavo, St.Moritz and the Alp Grüm over the Bernina line. Railcars ABe 4/4 # 30 and # 34 in multiple control, built in 1908/1911 for the then independent Bernina Railway, are ready for departure in Ospizio Bernina as train 1639 to Alp Grüm, and later to Poschiavo. These additional trains could be used with the normal tickets without surcharge.