The Swiss National Park (Romansh: Parc Naziunal Svizzer; German: Schweizerischer Nationalpark; Italian: Parco Nazionale Svizzero; French: Parc National Suisse) is located in the Western Rhaetian Alps, in eastern Switzerland.

It lies within the canton of Graubünden, between Zernez, S-chanf, Scuol, and the Fuorn Pass in the Engadin valley on the border with Italy.

The highest peak in the National Park is Piz Quattervals, 3165 m.a.s.l, which can be reached by an alpine hike.

The Swiss Federal Council created a committee to determine a suitable location for this nature reserve, and the area surrounding the Fuorn Pass was found to be best suited for this endeavour due to its remoteness from civilization and richness in flora and fauna.

In 1913 a non-standing committee of the Federal assembly visited the Val Cluozza and afterwards supported the idea of a national park.

The municipality of Zernez was increasingly supporting the idea due to the fact that the leased area had little to no agricultural potential.

In 1968, during his tenure a new visitor centre was inaugurated in Zernez as was a Naturlernpfad (Nature learning hike) on the Fuorn pass in 1976.

[12] It was during Schloeth's tenure as director that the park would become part of the UNESCO Biosphere Reserve and would be classified as a IUCN category Ia.

[12] There was a proposition to create a less heavily regulated zone in the areas surrounding the park, which was however rejected by the public.