I couldn’t find any reasonable topographic hiking maps (free). So I have resorted to displaying the GPS Maps in Garmin’s Basecamp and then taking screenshots.
The GPS Maps for Portugal that I am using are from Freizeitkarte. I find Freizeitkarte produce the best OpenStreetMap files for European countries.
More information on using these maps on your GPS or in Garmin’s Basecamp is on my GR5 maps page
The map below shows the distances of the various stages of the Historic Trail and Fisherman’s Trail.
Numbers in brackets refer to the associated GPX file on my GPX files page