Question: BVZ Zermatt-Bahn forms part of the route that goes through mountain resorts in what mountain range?
Context: The Treuter Mountains ( ), formerly known as the Truter Mountains and the Trenter Mountains, are a small mountain range on eastern Devon Island, Nunavut, Canada.  The Treuter Mountains are part of the Devon Ice Cap which forms part of the Arctic Cordillera mountain range. The Cunningham Mountains are a small mountain range on the southeastern coast of Devon Island, Nunavut, Canada.  The Cunnington Mountains are part of the Devon Ice Cap which forms part of the Arctic Cordillera mountain range. Breheimen is a mountain range in the Sogn og Fjordane and Oppland counties in Norway.  The area lies west of the Jotunheimen mountain range.  The mountain range lies to the northwest of the Sognefjellsvegen road, north of the Sognefjorden, south of the Nordfjorden and Norwegian National Road 15, and east of Norwegian National Road 5 and European route E39.  The mountain range includes Jostedalsbreen National Park and Breheimen National Park. The Glacier Express is an express train connecting railway stations of the two major mountain resorts of St. Moritz and Zermatt in the Swiss Alps.  The train is operated jointly by the Matterhorn Gotthard Bahn (MGB) and Rhaetian Railway (RhB).  For much of its journey, it also passes along and through the World Heritage Site known as the "Rhaetian Railway in the Albula / Bernina Landscapes". The Furka Oberalp Railway (German: "Furka Oberalp Bahn" ) is a narrow gauge mountain railway in Switzerland with a gauge of .  It runs in the Graubünden, Uri and Canton of Valais.  Since January 1, 2003 it is part of the Matterhorn Gotthard Bahn when it merged with the BVZ Zermatt-Bahn. The Elkhead Mountains are a mountain range in Colorado.  The mountain range is considered to be low altitude within Colorado as the mountains are under 11000 ft .  Located within Routt and Moffat counties, the mountain range is far from metropolitan areas and has few lakes and streams, so it attracts few visitors.  The mountain range is a volcanic range and all of the peaks were formed by volcanic action.  The mountain range extends approximately 16 mi east to west and 10 mi north to south, and its center is located at , approximately 20 mi northeast of Craig and north of Hayden, Colorado 13 mi south of the Wyoming border.  Almost all of the peaks within the Elkhead Mountains are a part of Routt National Forest.  Significant peaks are: Bears Ears, Sugar Loaf, Saddle Mountain, Black Mountain, Pilot Knob, and Meaden Peak. The Pinal Mountains (Yavapai: Walkame) are a mountain range located in Gila County, Arizona.  They have a maximum elevation of 7,848 ft at Pinal Peak and a prominence of over 4,000 ft .  The closest city is the Globe, Arizona/Miami, Arizona area, which is just a few miles north of the mountain range.  The mountains are located within the Tonto National Forest, and their recreational facilities are maintained by the USDA's United States Forest Service.  The San Carlos Indian Reservation is very close to the mountain range, with its boundaries being just a few miles east/northeast of the range.  The mountains are covered with Ponderosa Pine and white fir and experience cooler weather than the Globe/Miami area, so that they are a popular recreation area in the summer.  The maintained facilities include a maintained dirt road that goes all the way to the summit of Pinal Peak, a campsite and recreational area, many hiking trails, as well as some radio towers near both Pinal and Signal peaks ( the two highest peaks of the range ).  The mountain range covers an area of 45,760 acres. The Krucze Mountains (Czech: "Vraní hory" , German: "Rabengebirge" Polish: "Góry Krucze" ) are the Eastern part of the Stone Mountains, which belong to the Central Sudetes on the border of the Czech Republic and Poland.  To the West and North-Western part the mountain range borders the Lubawska Plateau and the Karkonosze Mountains, to the North-Eastern part they border the mountain range Czarny Las, from the East they border the sediment basin Kotlina Krzeszowska and the Zawory mountain range and to the South the mountain range borders the Czech part of the Stołowe Mountains.  To the Southern ridge of mountain range is the Polish-Czech border.  The border crossing for cars is in Lubawka and for tourists is in Okrzeszyn. The Cordillera de Guanacaste, also called Guanacaste Cordillera, are a volcanic mountain range in northern Costa Rica near the border with Nicaragua.  The mountain range stretches 110 km from northwest to the southeast and contains mostly complex stratovolcanoes.  The range forms part of the southern region of the Continental Divide, with the highest peak is the stratovolcano Miravalles at 2,028 m. 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.  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.  The BVZ also forms part of the much travelled and admired route of the Glacier Express between St. Moritz and Zermatt.  Opened in 1891 as the "Visp-Zermatt-Bahn" (VZ), the BVZ merged on 1 January 2003 with the Furka Oberalp Bahn (FO) to form the Matterhorn Gotthard Bahn (MGB).
Answer: Swiss Alps