La Sure, Limestone summit in the Vercors massif, Isère, France.

La Sure is a summit of the Vercors massif reaching 1,643 metres in the Isère department, between La Buffe (1,623 m) and the Sornin plateau (1,596 m). It rises on the left bank of the middle Isère cluse above the communes of Veurey-Voroize and Noyarey. Its sheer pale grey Urgonian limestone wall is topped by a stand of dark coniferous trees, and a small weather station stands at the summit.

The region has a history of summer herding dating back to the 19th century, when shepherds brought flocks to the slopes during warm months. This practice shaped the mountain landscape for generations.

The name Sure comes from ancient linguistic roots referring to elevated geographical formations. You can still find traces of this naming tradition in the local place names across the region today.

The hike from the valley floor is demanding and requires sturdy footwear and good endurance for steep sections. Weather can change quickly at higher elevations, so come prepared for shifting conditions.

A small weather station stands at the summit of La Sure, at 1,643 m. From the top, the view takes in the Grenoble conurbation, the Chartreuse massif and the Mont-Blanc massif. The summit lies between La Buffe (1,623 m) and the Sornin plateau (1,596 m), above the villages of Veurey-Voroize and Noyarey.