The Interrail One Country Pass is available for any of the member countries except for Bosnia-Herzegovina and Montenegro.
Belgium, Holland and Luxembourg do not have their own individual passes and the three are grouped into one common pass called "Benelux Pass".
An Interrail One Country Pass lets you travel in the country it is valid for, but offers no reductions in any other countries.
The Interrail Portugal pass cannot be purchased by residents in Portugal.
Some trains and ferries have special terms and conditions that imply paying extras, such as:
The Interrail One Country Pass is on sale up to eleven months in advance from CP international ticket offices.
See the official Interrail site for further possibilities
The Rail Planner App lets you plan your Interrail and you always have the times for all the trains in Europe wherever you are (even without Internet access.
The free App can be downloaded for iPhone and Android.