Ereño

Ereño is a town and municipality located in the province of Biscay, in the autonomous community of the Basque Country, northern Spain.

Ereño
View of Ereño
Coat of arms
Ereño Location of Ereño within the Basque Country Show map of the Basque Country Ereño Location of Ereño within Spain Show map of Spain
Coordinates: 43°21′04″N 2°36′57″W
Country	Spain
Autonomous community	Basque Country
Province	Biscay
Comarca	Busturialdea
Government
• Mayor	Joseba Zarragoikoetxea Zenicacelaya
Area
• Total	10.67 km2 (4.12 sq mi)
Elevation	278 m (912 ft)
Population  (2018)[1]
• Total	239
• Density	22/km2 (58/sq mi)
Time zone	UTC+1 (CET)
• Summer (DST)	UTC+2 (CEST)
Postal code	48313
Website	www.ereno.org

Ereño is famous for its ″marble″. In the 1st century CE the Romans were mining the quarries, which are no longer being used. There are literary references that call Ereño the "capital of the marble route". This material can be found in numerous buildings in Urdaibai and also on the other side of the ocean. The decorative limestone Rojo Ereño was named one of the IUGS Heritage Stones in 2024.^[2] According to historian Tomás de Goikolea, Ereño was built in the 9th century and the residents of the town may be direct descendants of the inhabitants of the Santimamiñe cave.

On 29 September, the San Miguel festival, a popular mass is held and a pilgrimage is done.