The Lötschenlücke connects the Lötschental to the valley of a glacier with a length of about what in 2014?
Lötschenlücke: The Lötschenlücke (el. Lötschenlücke:  3164 m.) is a high mountain pass of the Bernese Alps, connecting the Lötschental to the valley of the Aletsch Glacier in the canton of Valais. Aletsch Glacier: The Aletsch Glacier (German: "Aletschgletscher" ) or Great Aletsch Glacier ("Grosser Aletschgletscher ") is the largest glacier in the Alps. Aletsch Glacier:  It has a length of about 23 km (2014), has about a volume of 15.4 km3 (2011), and covers about 81.7 km2 (2011) in the eastern Bernese Alps in the Swiss canton of Valais.
23 km