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We did the Norte @ about 15-20 km/day, staying in albergues and monasteries. Several of the days we could have split into two 10 km days had we had the time. We spent a lot the days alone, but that was several years ago.
I think lt56ny is talking about the stretch between Galizano and Somo. If so then no, there are no guard rails. You can take the road (CA-141) straight into Somo, though.
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