San Donato baseliza

The Hermitage of San Donato crowns a mountain summit above the Ergoiena valley in Navarre, and gives the peak beneath it the name most locals actually use.

On official maps the mountain is called Beriain (1,493 m), but among Navarrese hikers it's simply known as San Donato, after the chapel standing at its top. That familiarity is well earned: with a topographic prominence of nearly 900 metres, it's the peak with the greatest prominence in all of Navarre, which means it dominates the skyline for miles and rewards climbers with one of the widest panoramas in the region.

Where exactly is it?

San Donato sits on the ridge of the Sierra de San Donato, part of the larger Sierra de Andía range. Its northern slope drops toward the municipalities of Huarte-Araquil, Arakil and Irañeta, while its southern slope overlooks the Ergoiena valley, home to Unanua and Torrano. Most ascents start from the Ergoiena side, which makes the valley the natural base for anyone planning the climb.

How do you get there?

There's no road to the hermitage — it's reached on foot only, via a trail that climbs from the villages of the Ergoiena valley, most commonly Unanua. The path crosses genuine mountain terrain, so proper footwear and a check of the forecast are worth the effort: the exposed ridge catches strong wind, particularly in autumn and winter. The climb is a well-known day trip for hikers exploring Navarre and appears on numerous hiking and trail-route sites.

What will you see once you're up there?

The building itself is a stone chapel on a rectangular plan, topped with a pitched roof and a distinctive bell-gable (espadaña) rather than a full bell tower. The interior is often closed on ordinary days, as is typical for mountain hermitages across Navarre, so the main draws are the architecture itself and the sweeping view over the Sierra de Andía and the valleys on either side of the ridge.

The chapel is dedicated to San Donato and San Cayetano, and local tradition holds that a sanctuary has stood on this spot since at least the 17th century, making it both one of the older religious buildings in this part of Navarre and the highest-altitude hermitage in the region. Devotion to San Donato runs through the whole valley: in nearby Lizarraga, also part of Ergoiena, a Renaissance-era statue of the saint from the second third of the 16th century has been preserved.

When should you visit?

Spring, summer and early autumn are the best times to climb San Donato, when the trail is dry and visibility from the summit is at its best. In winter the ridge can turn icy and exposed to heavy wind, making the ascent considerably harder — it's wise to take extra precautions or wait for milder weather.

Frequently asked questions

Can you drive up to the hermitage? No — San Donato is reached on foot only, via a trail from the Ergoiena valley, most commonly starting in Unanua.

Is the chapel open to visit inside? Usually not — like most mountain hermitages in Navarre, it tends to stay closed day to day, so the highlight is the exterior architecture and the view from the summit.

Why is the mountain called both Beriain and San Donato? Beriain is the official geographic name of the peak, while San Donato is the popular name taken from the hermitage at its top — both are used interchangeably.

Why does San Donato stand out so much on the horizon around Ergoiena? Because it has the greatest topographic prominence of any peak in Navarre, it towers over the surrounding terrain and is visible from many villages in the Ergoiena valley and neighbouring municipalities on the northern slope.