This route unfolds in the country around Odalengo Grande, in the Cerrina valley. It's for cyclists with a good sense of direction and in decent shape, as it's a bit demanding.
'Odalengo' may come from 'Audelingo', although some say it comes from the German name Odilo. The first mention of Odalengo Grande is in a document from 14 March 940,  describing two Longobard knights from the placitum of Asti, named Gunterius and Vuilelmus de Audelingo. This confirms that it was once Audelingo (and indeed Odalengo in Piedmontese dialect is Audaleng).
We've been a bit creative with the title for this route, taking the 'grande' in the village's name and applying it to the great knight Vuilelmus de Audelingo.
Start in Odalengo Grande itself, in Piazza San Defendente, where you can leave your car. Head off along Strada S. Antonio, going uphill past the little chapel of Ave Maria. Through the trees you'll spy the church of San Vittore, before reaching the tarmac on Via Vallarolo. Cross the hamlets of Vallarolo, San Antonio and Case Voggiardi and go off in the direction of Cortiglione (all in the province of Asti).
Right after the houses, the route goes right. Follow the GPX onto a grassy track through fields and woods to the SP 590 in the Cerrina valley. Go uphill again, on tracks, to the middle of Murisengo, famous for hosting the national golden truffle festival on the second and third Sundays in November. Once you're on Via Asti, at the junction by the church of the Madonnina, turn right onto Via S. Pietro and, after about 1 km, right again through a row of plants onto a singletrack back up to Via S. Pietro. Once you're on the tarmac again, turn right then left, following signs for Villadeati. Cross Via Case Vallone and go up to the village, at the top of which you'll find the pretty Villa Belvedere. Once you're out of the village, after about 1 km of bends, the road comes to the highest point on the route, at 409 m. The scenic Lussello-Villadeati road goes up to the first bend then heads left onto the street signposted for Rondaneto. After a few metres, you'll come to a junction, where you should take the track on your right. It will bring you through dense woodland to the hamlet of Pessine. Nearby Odalengo Piccolo is the capital of the municipality and famous for its 'Tufo e Tartufo' ('tuff and truffle') regional fair, held in honour of white truffles every October. Follow the signs for SVC (Superga, Vezzolano, Crea) for a bit, before turning left in the direction of the village of Pozzo. Take a singletrack running steeply down a narrow hollow to the bottom of the valley. After 3 km downhill, you'll come to the SP 590, which you should cross (with care) to take the road signposted for Montalero. Go up for about 1 km then turn left for Rifredda. At the junction, turn right onto a track and go up until you're almost at the top of Monte Favato. After turning left at the junction, you reach the top and go briefly downhill to the end of the route, back in the village of Odalengo Grande.