Question: BVZ Zermatt-Bahn forms part of the route that goes through mountain resorts in what mountain range?
Sentence (from "BVZ Zermatt-Bahn"): The Brig-Visp-Zermatt-Bahn (BVZ) – officially known between 1991 and 2002 as the BVZ Zermatt-Bahn – is a metre gauge railway in the Canton of Valais, Switzerland.
Relevant evidence: No