I am (cross fingers) starting a new job in the US early June, but am hoping to cycle up L'Alpe d'Huez before leaving (and maybe head down to Italy to watch Lance win the Giro d'Italia ).

Does anybody know when in the Spring it typically gets warm enough to ride up? Are there certain dates the passes "open" to cyclists?

Also, I really need to get back on my road bike soon and start getting back in shape. If anybody is interested in doing some riding around zurich, let me know!