The Base Nato is one of the first mountain-bike trails built around the Base Nato, the former NATO base in the Melogno area: number 92 on the Finale Outdoor Region map, rated difficult.
Of the four trails that drop from here towards Orco Feglino, it is the longest. It is fast, with small jumps, berms, a few rock gardens and plenty of flow.
For first-timers it is a good introduction to the style of the trails in this area. Before you set off, check on the Finale Outdoor Region website that it is open: trails close for maintenance, races or bad weather.