I've found and booked the following track days. If you know of any others within 2-3 hours of Zurich this summer please let me know!

http://www.ktmraceorange.com/Dates-R...on.1204.2.html
Anneau Du Rhin (2 hours from Zurich)

http://www.dannhoff-motorsport.de/te...ntraining.html
Anneau du Rhin (again)

Circuit de Bresse.

Thanks - which companies run events there?

The obvious ones are Nurburgring and SPA. Don't know about bikes though, have only done track days in car