The standard time-table for the Circuit 3 is as per the below :

An additional stop in the morning in St-Genis Porte de France will be stopped for CERN Summer Students from the 4th of September onwards.

Printable version (pdf format)

The precise location can be found on Google Maps: "Ferney Château" :

Meyrin to ALICE 

• St Genis II*

TPG stop Saint Genis Lion (Hautains road)

ALICE to Foyer Schumann    

- St Genis I*    

TPG stop Saint Genis Lion (after the roundabout on Geneva road)