Just to advise that I’ve now loaded my notes on the CPI (completed Oct 15) to the resource section of this site.
Ivar has created a new sub-section for the CPI so as not to confuse it with other Portuguese routes.
Many newbies may mistakenly assume that the CPInterior is same as the more well-known Camino Portugal route (Lisbon-Porto-Santiago with coastal and central variants)
The CPI goes from Viseu (or even a little before here at Farminhao) to Chaves-Verin-Santiago (via Sanabrese route either upper or lower variant)
My guide covers Viseu-Chaves-Verin-Allariz-Ourense-Santiago. An awesome camino with stunning views and a lot of very steep walking for the first 6 days. The best way to see the Douro valley.