Adventurous stretch completely unpaved along the original site of the old Sulcis railway closed definitively in 1958. Beautiful viaducts, tunnels and unspoiled nature. The route is neither official nor maintained, be careful when riding it.
Done in March 2025. The section from the Dam to Terrubia is a bit overgrown with vegetation (cistus and broom). It is doable but some sections are necessary by hand. Too bad because it is truly beautiful and fascinating.