How long does it take to visit Castle Chillon?

Question

I am wondering on how much time should I allocate for visiting Castle Chillon once I arrive at Montreux train station. I am travelling from Geneva to Bern via Gloden Pass line and will arrive at Montreax at @ 12:40 PM. I have the option of taking the Panoramic Express at 3:45PM or at 5:45PM (last one) to Zweisimmen and from there to Bern. I am travelling with a Swiss Pass, so cost is not the problem.

Answer 1

Take the 5:45

Answer 2

Three hours are hardly enough to visit Château Chillon, still, it can be done. So take the last train to Zweisimmen. Have fun at Lake Geneva/lac Léman!

Answer 3

Take the second option.  You want to stay about 2.5 hours at the Chateau, so you need the time to travel from Montreux to Chillon.  It's worth while.