How to reach Morteratsch (Hotel Morteratsch) ...
... by public transport from Zürich, main station:
There is a train every half-hour to Morteratsch. Departure from Zurich in direction to Chur 15:37, 16:07 etc. Change train in Chur (in direction to St. Moritz) and in Samedan (in direction to Poschiavo
Hotel Morterastch, see also: https://www.morteratsch.ch/
... by car from Zürich:
Take the highway Zurich - Chur - Thusis. Follow the main road in direction to St. Moritz and Pontresina.