The Covered Alley of Er-Roh is a monument in the municipality of La Trinité-sur-Mer (Morbihan, Brittany). It is an attraction for holidaymakers staying in the region.
Dolmen classified as Historical Monuments, the covered alley of Er-Roh de La Trinité-sur-Mer, in Morbihan, is an alignment dating from the Neolithic and freely visible.