Opening time ESS Gryon Opening time ESS Gryon Office ``Les Chaux`` 50 meters from the arrival of the Barboleuse-Les Chaux gondola. Open from 9:30 am to 12:15 pm and from 12:45 pm to 4:oo pmAdministration Phone: +41 24 498 24 34 Open from 9:30 am to 12:15 pm and from 12:45 pm to 6:00 pm
