Roll out of Tronzano Vercellese and let the ride unfold: first the Risaie vercellesi nature reserve, then the Castello dei Tizzoni di San Genuario. On you go past Lago di Maglione and the Castello di Borgomasino, with the Lago di Viverone and the Castello di Roppolo following in turn. The 91.8 km loop is almost entirely paved and brings you back to where you started.