Montagne du Droit, Mountain summit in Bern, Switzerland

Montagne du Droit is a mountain peak in the Jura range reaching 1289 meters, formed along a ridge line with distinct slopes on either side. The summit overlooks multiple valleys and surrounding communities in the region.

The name comes from the mountain's adret, the sun-facing slope that rises above Saint-Imier; the opposite, shaded side is still called the Envers. German-speaking Mennonites settled here and long used the name Sonnenberg for the whole ridge, not just Mont Soleil. Since the 1990s the crest has hosted Switzerland's largest solar power plant on Mont Soleil and its largest wind farm on Mont Crosin.

This peak stands near communities where watchmaking has been a way of life for centuries, with artisans continuing their craft in the surrounding valleys today. The region's identity remains deeply rooted in this tradition.

The only larger road crossing the ridge runs over the 1227 m Col du Mont Crosin, linking Saint-Imier with Tramelan and Les Breuleux. The southern flank drops steeply to the Vallon de Saint-Imier, while the northern side slopes gently toward Les Breuleux and Tramelan. The crest stays between 1100 and 1250 m along its roughly 25 km length.

The southern slope exposes competent Upper Jurassic (Malm) rock layers at several points, while the northern flank dips only gently. The ridge also lacks the eroded fold crest seen on many Jura chains, so it has no pronounced erosion valleys. At Champ Meusel on the Mont Soleil's south slope, northeast of Saint-Imier, a hollow marks the remnant of a prehistoric meteorite impact rather than erosion.