www.sibillinibikepacking.it/web/eng/index.htm
bikepacking.com/routes/bikepacking-sibillini-italy/
"Surrounded by the spectacular mountains of Marche region, Monti Sibillini National Park offers a 3-4 day bikepacking loop around one of the most impressive and spectacular massifs on the Italian peninsula. The route follows gravel roads and singletrack trails through enchanting and timeless landscapes where many myths and medieval legends began."