The Entlebuch Biosphere is a UNESCO-designated biosphere reserve in the Swiss canton of Lucerne. Covering an area of approximately 395 square kilometres, it was designated in September 2001 as Switzerland’s first biosphere reserve under UNESCO’s updated criteria, which require both ecological conservation and sustainable human development. Nearly a third of the area is protected moorland, and the mountainous karst region of Schrattenfluh forms part of the core zone of the reserve.