There are a few on here:
http://www.bikely.com/listpaths/country/234

The real mountain passes should open up in a few weeks. Catching the train is ideal for bike riding, eg train to Fluelen, ride the Klausen pass, train back from Ziegelbrucke (or as far as you get), all up CHF 32- (tickets+bike with half price card).

Its been good to start some training in the last sunny four weeks we had. Post here if you are going out for a ride and I'll do likewise.