Normal mountaineering routes to Sasseneire are from Val de Moiry on the east and from Val d'Herens on the west. Both routes lead to Col de Torrent which is at 2916 m above the sea level. A very convenient start point is the dam at the Moiry lake, with the car access and with the bus service from Grimentz. You need 2.5 hours from the dam to the Col de Torrent.