The Colla San Giacomo AV is the best access road in the Base Nato area: number 99 on the Finale Outdoor Region map, easy-to-intermediate cross-country.
Most of the trails dropping from the Base Nato cross it, and it is also a great way into the Mallare and Vezzi areas.
The gradient is comfortable and the surface stony but pleasant to ride. Before you set off, check on the Finale Outdoor Region website that it is open: trails close for maintenance, races or bad weather.