The only reason to do this hike is if you are looking for a hard workout, which it is - extremely long, steep and technical (wear hiking boots!). You will definitely break a serious sweat. Unfortunately that's about the only good thing I found about it. It was ugly (freeway overpass, graffiti, rusted cars and corrugated metal fencing), very poorly marked (you will lose the trail multiple times and be barked at by multiple junkyard dogs). I cannot recommend this trail at all. Many better ways to spend a few hours.
Antico eremo del Colle San Marco. Costruito nella roccia e raggiungibile solo a piedi dopo una camminata su un ripido sentiero nel bosco. Spettacolare la vista della vallata, dei Monti sibillini e della città di Ascoli Piceno.