This is a festivity focused on women in childbirth, but it is not a fertility festival in the usual sense.

One of its singularities is that women come to the pilgrimage in Boiró to ask San Ramón for a child.

It is a pilgrimage that, although it dates back to the 18th century, is linked to pagan rites that are lost in time around serpentiform engravings, a symbol of fertility, which can be seen on two slabs next to the hermitage of San Ramón.

Not only is it one of the oldest festivities in Galicia, but it is also the oldest uninterruptedly celebrated rural pilgrimage (since 1756), with thousands of people attending.

Many people go as pilgrims, camp in O Campo dos Outeiriños on the night of the 30th, and stay there until well into the night of the 31st, after enjoying a full day of food, wine, and orchestras.

On the morning of the 31st, there are masses in the hermitage every hour.

These masses are attended by women in search of a happy birth or pregnancy and, in the last one, where the largest number of pregnant women from all over the municipality and the surrounding area congregate, the saint is taken out in the procession.

There is also a dessert called "sanramón", which is given to friends to wish them a good birth.

In O Campo dos Outeiriños, there is such an accumulation of historical and archaeological remains that it is well worth a visit to let yourself be enchanted by a singular and unique landscape that brings us closer to ancient traditions and the spaces immortalised in their works by Galician writers such as Valle-Inclán, Castelao, Eduardo Dieste, and Borobó.

The numerous petroglyphs and crags are scattered around O Campo dos Outeiriños, where the pilgrimage is held.