Mortola, very close to San Rocco (just 10 minutes from the belvedere) introduces the most demanding of the various paths that lead to the batteries (45 minutes), the Semaforo Nuovo (1 hour and 15 minutes) and San Fruttuoso. The trail to San Fruttuoso requires more than a discrete physical training for a fairly challenging route which averages 2 hours and a half.
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See the
Portofino map with a complete picture set.