The route is a pleasant walk in the Pian di Spagna, a small plain of great importance and naturalistic value, a migratory avifaunal corridor between Northern Europe and Africa.
The easy route follows the dirt road through the northern Reserve toward the shores of Mezzola and Dascio lakes: cultivated fields, meadows, sedge and reed beds. The biodiversity is really varied and rich and it is possible to observe - along the way - typical flora and fauna such as frogs and toads, swans, foxes and deer. The intermediate stop - with picnic area - is Cascina Poncetta, a rustic farmhouse restored to an educational center.
The loop trail has the railway station of Nuova Olonio (Municipality of Dubino) with convenient pedestrian underpass as its starting and ending point.