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I've found this on the internet, not really on the camino, but the only one I've found :
http://www.infohostal.com/guia/guipuzcoa/pasaia/alojamiento/7194/hostal-bahia.html
There really are two desviations, the first one before the plogono industrial avoiding the Citroen Parking, the second one just before entering Porrino.
The first one is very wel indicated and you'll have no trouble following the arrows.
The second ons starts at the Peugeot garage entering...
That is the general idea. However, if you see the shell pointing one way and a yellow arrow pointing the other, always follow the arrow. We've noticed that a lot of shells are put any which way, without having a clue ...
We have walked the Camino Portugues last week. There are actually two detours before PORRINO.
The first one is to avoid the industrial site of Porrino. The detour is very well marked (there is a big sign at the beginning and lots of new arrows along the way)
The second one is at the entrance of...
We are planning to walk the alternative route on the 23th of march and I have been worried to find the right spot to leave the old camino, untill I've found this website :
http://www.gronze.com/camino-de-santiago/blog/index.php/camino-portugues-se-acabo-la-penitencia-del-poligono-de-o-porrino...
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