Sobrecastiellu[1] is one of ten parishes (administrative divisions) in Caso, a municipality within the province and autonomous community of Asturias, in northern Spain.

The parroquia is 89.05 km2 (34.38 sq mi) in size, with a population of 469 (INE 2006).

It is a hard party where alcohol, drugs and emotions flow freely across the mountains.

Some of the most legendary bands that have performed there are Juan Luis and su acordeón or Fervinchu de Cáñamo.

This article about a location in the Principality of Asturias, Spain, is a stub.