The stage 41 Viterbo/Vetralla can be walked (17 km) along the ancient Signorino variant route, track B21 AEVF app

 Starting from Piazza del Sacrario, one crosses Piazza del Plebiscito until exiting the medieval walls of Viterbo through Porta Romana; one passes under Porta San Biele and then Via della Grotticella before climbing up Strada Roncone. From here begins a path through chestnut and oak woods until reaching the village of San Martino al Cimino, a hamlet of Viterbo. You enter San Martino al Cimino through the North Gate, skirting the famous 13th-century Cistercian Abbey; after crossing the entire village, you exit through the South Gate. After a few kilometres on easy undergrowth paths and a few stretches on asphalt roads with panoramic views north towards Montefiascone, we enter the woods of Monte Fogliano along shady paths that descend towards the village of Tre Croci, a hamlet of Vetralla. From Tre Croci, there is a short stretch of dirt road that reaches Vetralla, crossing Foro Cassio. It is also possible to reach Vetralla by following the B21 cycle route from Viterbo to Sutri.