Monte San Vicino, Mountain summit in Marche, Italy.

Monte San Vicino is a 1,484 m limestone mountain in the Umbria-Marche Apennines, in the province of Macerata near the border with Ancona. From the south it looks like a camel's hump, from the north it has three peaks, and from east or west it resembles an extinct volcano. A large iron cross stands near the summit.

The name San Vicino may derive from the Roman god Janus, called vicilinus, watching over the border between the Piceni and the Umbri; the mountain was also once called Monte Suavicino. In past centuries Adriatic sailors and fishermen used it as a landmark, visible far offshore. Since 2009 the Regione Marche has protected it in the Riserva naturale regionale del Monte San Vicino e del Monte Canfaito.

The name San Vicino may derive from the Roman god Janus, the two-faced guardian (vicilinus), to whom the mountain was perhaps dedicated to watch over the border between the Piceni and the Umbrians. A local proverb still forecasts winter weather from clouds or the first snow on the peak: "Se San Vicino si mette il cappello, vendi le capre e compra il mantello."

Bring sturdy footwear and weather protection, as the elevation and open terrain can bring sudden weather changes at the summit. The best time to hike is from spring through fall when the trails remain easily accessible.

The mountain's profile changes with the viewpoint: a single hump from the south, three peaks from the north, and from east or west it resembles an extinct volcano. Because it stands isolated, sailors and fishermen of the Adriatic used it for orientation offshore in past centuries.