Montagne de la Lance, Free flight site in Drôme, France.

Montagne de la Lance is a mountain of the southern Prealps in the Drôme, culminating at 1,340 metres at Rocher Garaux. Its crest of alpine pasture rises above a forested massif, with a rounded central summit and a secondary peak to the right. The ridge marks the boundary of seven communes, and its southern front borders the Tricastin plain.

Celtic populations established the city of Aeria near the present-day location, leaving behind caves and ruins scattered across the central section. These archaeological remains show how ancient peoples valued the strategic position of this mountain ridge.

The mountain lies within the Baronnies provençales regional nature park and the "Une Autre Provence" country. Local groups study and promote its heritage, among them AVEN for Venterol, ARDEC in Roche-Saint-Secret-Béconne, MACT in Montbrison-sur-Lez and the Musée du Pègue. The alpine pastures are grazed by sheep and cattle, and the GR9 long-distance path of the Dieulefit area passes below the Rocher des Aures.

The trail from Teyssières starts along the yellow-marked Chemin des Favières and continues to Col de Coucourdet. From there, a red-yellow marked path leads to the summit with clear signposts at each stage.

An ancient beech grove along the hiking trail is roughly 400 years old, while southern slopes support green oak forests that disappear on the northern side. This contrast in vegetation reflects how microclimate shapes the forest on different elevations.