Here is a map of Versailles that shows the enormity of the gardens that extend to the west. Marked on the map is a recommended hotel and the RER stop that you'll likely depart if you come to Versailles from Paris.
From Paris, you can take the RER ligne C (RER line C) to Versailles-rive-gauche-château from Montparnasse station. Other options are found on the Chateau de Versailles web site.
Versailles is best visited from April to October. It's only a half hour trip from Paris.
Plan a Trip to Versailles
We recommend Pullman Versailles Château, in an excellent position near the Chateau. It's a luxury vacation, you deserve it!
Paper Map--Versailles
Versailles and Forests map gives detail for walks in Versailles and the wooded areas outside the city.
Rail Passes
Eurail France-Belgium-Netherlands-Luxembourg Pass
Auto Europe - Rent or Lease a car in France. Leasing in France is a good idea if you are staying a while. You get a brand new car and full insurance.