I live near here. In this area there are lots of wonderful paths. You can reach small villages by walking with a sight on mediterranean sea.
Sometimes it is reported that route 531 has been closed (since 2017). We could walk it without any problems, and it is listed as open on parconazionale5terre.it/iti_dettaglio.php?id_iti=3458.
Just don't take the evasive train! (As of September 2020)