Sénépy, Mountain summit in Matheysine, France.

Sénépy is a grass-covered mountain summit in the Dauphiné Alps, on the territory of Mayres-Savel near La Mure in Isère, reaching 1,769 metres. Its rounded ridge rises above the lower Drac valley and the Monteynard-Avignonet lake to the west and south, and above the Matheysine to the east. Patches of snow linger on the upper slopes, and a faint fence line climbs the left flank.

The mountain was formerly called Génépi, a name recorded before it became Sénépy or Senépy. It lies on the territory of Mayres-Savel near La Mure in Isère, within the Dauphiné Alps. A wind power project on its slopes has been studied, drawing opposition over environmental concerns.

The mountain's former name, Génépi, refers to a plant of the wormwood genus that grows in these high pastures. The slopes are mainly covered by high mountain pastures, and the open grass and low vegetation seen on the summit are the ground shepherds' flocks graze.

The ascent from the Drac valley side involves a climb of roughly 600 metres to the 1,769-metre summit, on a route without major technical difficulty. The summit is exposed to the northern bise, so windproof clothing is useful even in mild weather.

A wind farm project has been studied for the summit because of the strong northern bise winds, and it faces opposition from environmental groups. The mountain is also classed as a zone of ecological, faunistic and floristic interest.