Many people have told me that they wanted to start the Caminho Portugues in Lisbon but did not want to walk stages of 30+ days. With the help of many forum members, I have put together a short document that describes ways to break up those stages to suit your ability and interests.
One thing I can assure you is that there is a wonderful group of albergue owners located north of Lisbon and south of Porto (all mentioned in this document) whom you can rely on for help in just about any situation. They are working hard to provide outstanding pilgrim services and will help you organize stages, make reservations, carry your pack, transport you, etc. etc. Knowing they are there should definitely ease your mind.
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Short Stages from Lisbon to Porto 2014-04-15
How to reduce the 30+ km days to suit your tastes and abilities
in Santiago de Compostela