Biviers () is a commune in the Isère département in southeastern France. Geography Biviers lies northeast of Grenoble on the D1090 road, at the foot of Mount Saint-Eynard, on a limestone scree located on the east side of the Chartreuse mountains. It is part of the Grenoble urban unit (agglomeration). Towards the southwest, Biviers faces the Belledonne range, in the Grésivaudan section of the Isère valley. On the northwest, the village leans against a tall limestone cliff above the scree. The cliff is subject to constant erosion, and rock slides are frequent during the summer, with great noise and much dust. Mont Blanc can be seen from many places in the village and is only in line of sight. Biviers can be subdivided into three main sectors: The upper part is a cliff starting from an elevation of and culminating at . The middle section – between and – is a forest and is a favorite destination of hikers. The slope is steep and averages 20%. This section is sparsely populated. The lower section sits on flatter ground and is where most inhabitants live, the lowest point of the village being at . Administration The current mayor of Biviers is Thierry Ferotin, elected in 2020. Biviers is a member of the intercommunality as of 2022. Population The inhabitants of Biviers are known as (). From 2012 to 2017, the birth rate was 0.55% vs. a mortality rate of 0.71%. Despite the negative difference, population increased on average by 0.5% per year during the same period. In 2017, women represented 50.8% of Biviers' population versus 49.2% for men. Its population is relatively old compared with the average of the Isère department. Places, monuments and curiosities Montbives is a fortified house, built during the 14th century and sitting just below the middle section of the village. It boasts a massive square tower and an impressive kitchen with carved stone pillars. The château de Serviantin dates back from the 15th century. The name stems from Abel Servien who was born there in 1593 and who later served as a minister for Louis XIII. Its square tower can be seen from chemin de la Grivelière and is a classified historical monument. The château de Franquières is more recent and dates back from the 17th century. It was built between 1601 and 1610 by the Aymon de Franquières family. During the French revolution, the property