The route needs good cycling skills as it is mostly over hilly tracks with ruts, some hidden by grass. It also requires physical strength, as it involves slopes of 13% and over. There are views on both sides of the Cerrina valley and Sacro Monte di Crea.
Start in Gaminella, a village near Mombello Monferrato, in the car park in front of the night club Deniro, on the SS 590.
Take the road and turn left after the Agip garage. A little on, you'll reach a grassy track that takes you up to cross the SP 9, which in turn leads to Mombello. Go down a few metres and join the track going uphill. Once you arrive in Mombello Monferrato, you can enjoy the view from Via Roma, with its old crenellated walls, of Serralunga di Crea, Sacro Monte and the shrine in Crea.
Set off towards Ilengo. At the first house you see, go down the track, stay on the right and don't turn off, and you'll arrive back on tarmac. Head towards Solonghello and go through it down a steep slope. Once you get to the bottom, take the track uphill, follow it without turning off, cross the tarmac road, pass the houses a little further on, and turn right on the track to reach the SS 590.
Pass through Castagnone and Madonnina di Serralunga and take the turning for San Iorio. Go off the bend onto a track that ends at a cemetery. Go on to Serralunga di Crea. You'll reach the church through an arcade belonging to a library named after Cesare Pavese, who hid out in Serralunga from 1943 to 1945. The square has a view over Sacro Monte di Crea, and as you leave the village, you see the bottom and the other side of the Cerrina valley.
Once you've left the village, go up at first on tarmac and then a track, to reach a farm. Go down a track and be careful on it.
At the bottom of the hill, go on through Casalino. A steep 13–15% climb will take you into the woods. Go downhill on your right, again being careful.
Arrive at the Pezzere di Cerrina area without turning off for Montaldo. Go up Via Centrale until the tarmac runs out and carry on along the track. As always, you need to watch out here for cars and tractors.
The final village is Case Bertola. Go down some steep hairpin bends to arrive back at your starting point in Gaminella.