Montagne de la Baume is a mountain of the Alps in the department Alpes-de-Haute-Provence in France. It stretches between the settlements of Sisteron to its west, from which it is separated by the river Durance, and Entrepierres to its east. At Sisteron, it ends with the vertically fissured rocky wall Falaise de la Baume. Its key col is Col de Mézien (elevation: ) to the north of its summit. The southern climbing route to the summit of Montagne de la Baume passes through the cave Grotte du Trou de l'Argent.
Climbing routes The summit of Montagne de la Baume can be reached via a southern route starting in the west at the settlement of Sisteron and passing through the cave Grotte du Trou de l'Argent. Alternatively, it can be reached via a northern route starting at Sisteron and passing Col de Mézien.
Southern route The trail to the summit of Montagne de la Baume starts immediately at the foot of Falaise de la Baume. The trail towards the beginning of the summit area has a gravel surface, is comfortably wide and well maintained. It is a normal uphill hike. South of the summit, a steeper trail branches off towards the summit in the north. Its surface is a ground/gravel mixture and therefore, it is possible to slip occasionally. Below the rocky wall of the summit, the trail bends to the east and, after about , the entrance of the cave Grotte du Trou de l'Argent is reached. The cave acts as an approximately long, in one place very narrow passageway. Since the sunlight does not shine through the whole length of the cave, having a torch is advisable. In its upper section, the southern cave wall has holes offering beautiful views towards the Durance valley. Having passed the cave, the summit rock has to be climbed over several rock steps at a length of about . There are steel cables installed. Yet, a head for heights and sure-footedness are advisable. Having reached the ridge, the last about to the summit are not challenging. Due to the southern rocky wall of the summit area, the fall hazard should be observed at the summit.
Northern route The northern route is easier to climb than the southern route. It is ideal for the decent. It resembles mostly a normal hiking trail and does not require particular alpine experience. The path from Sisteron in the west to Col de Mézien in the east has a ground/gravel mixture surface, is comfortably wide and mildly inclined. The final ascent from Col de Mézien to the summit is more strongly inclined. Its surface is a ground/gravel mixture as well, but with a greater proportion of earth, particularly towards the summit.
View The best view is offered through the holes in the southern wall of in the upper section of Grotte du Trou de l'Argent and when climbing the summit rock after having passed the cave. The summit of Montagne de la Baume is densely wooded. Due to the southern rocky wall, it offers some view to the south and southwest. It does not offer a view into other directions.
géoportail, Carte topographique IGN, Montagne de la Baume, retrieved 2026-06-14 géoportail, Carte topographique IGN, Failaise de la Baume, retrieved 2026-06-14 géoportail, Carte topographique IGN, Col de Mézien, retrieved 2026-06-14 géoportail, Carte topographique IGN, Grotte du Trou de l'Argent, retrieved 2026-06-14 Ascent of Montagne de la Baume on 26 May 2026 in the morning hours under sunny weather conditions via the southern route starting at Sisteron and with descent via the northern route back to Sisteron.