In balance between 2 climates

On the South Corniche of the Vercors, you progress on a line of climate change. In the slopes to your right, descending towards the valley of the Drôme, one finds holm oaks, one of the emblematic trees of the garrigue, vegetation of the Mediterranean climates. If you hike in July, you will probably notice purple squares among the fields below. These are the most northern lavender of France. The perspective opens up the valley of the Drôme. The big rock in front of you, the Glandasse, forms the southernmost point of the Vercors Hautes Plateaux Nature Reserve and marks the extreme advance of the Northern Alps. The massifs which close the horizon to the south make with the Baronnies on the left bank of the Drôme and Mediterranean climate obligatory, part of the Pre-Alps of the South.