The Gorner Glacier (German: Gornergletscher) is one of the largest glaciers in the Alps. It is about 12 km long and 1 to 1.5 km wide (depending on when you read this, as it is rapidly retreating). The Gornergletscher is situated on the west side of the Monte Rosa massif close to Zermatt and is easily reached with the Gornergrat Bahn from Zermatt. I first visited Zermatt and the Gornergrat summer 2014. The following year I took a guided tour across the Gornergletscher to the Monte Rosa hut.