The normal climb starts in Arsiero (308m) (or just above (361m) if coming from Passo Xomo (1059m)) and goes via Tonezza (and Sella (1110m)) after which you come to the turn-off for the Vena road. You can also go back down this road from the main road, which would be easier, but not as fun (what I did on my first visit). You pass by Passo di Vena di Sotto (1496m) on the way up this narrow road.

Most fun and for a more consistently steep climb you should take the small road from Barcarola (303m), which has no sign-posts, but there is only that road going up here. It has 24 numbered hairpins and seems like it is only used by the occassional cyclist. You come up the main road just as you approach Tonezza.

The road comes out on the main road again up to Passo del Sommo (1342m) just before the next turn-off for Valico di Valbona (1781m). Just a little up this road you first come to the Bocchetta degli Alpini (tunnel) (1566m).