Playa de Penarronda, Protected natural monument beach in Tapia de Casariego, Spain

Playa de Penarronda is a protected natural area on the Asturian coast located between two municipalities in western Spain. The beach features wide sandy stretches, rock outcrops, and dune formations that shape its coastline.

The site received official protection as a natural monument in 2002 and was later recognized with additional environmental conservation designations. This recognition reflects the region's commitment to coastal preservation over time.

The beach takes its name from the stream of Penarronda, also called río Dola, which flows into the sand and splits it in two. In the middle of the arenal stands the well-known Pedra Castelo, a rock landmark that bathers use to orient themselves. The surrounding dunes are part of the protected space and are rare on this northern coast.

The beach is accessible on foot and offers open areas for exploring plus opportunities for water sports like surfing and diving. Visitors should note that certain areas are protected and pets are not permitted in all sections.

In the centre of the sand sits a rock known as Pedra Castelo, a landmark visible along the whole beach. The dunes behind it hold most of the 34 protected hectares, a habitat rare in northern Spain. Penarronda is also a nesting site for the Eurasian oystercatcher.