Question: BVZ Zermatt-Bahn forms part of the route that goes through mountain resorts in what mountain range?
Sentence (from "BVZ Zermatt-Bahn"): Its 44 kilometre long line links the communities of Brig and Visp in the Rhone Valley with Täsch and the car free holiday resort of Zermatt in the Mattertal.
Relevant evidence: No