Riserva naturale Nomentum, Regional nature reserve in Fonte Nuova and Mentana, Italy.

Nomentum Regional Nature Reserve covers about 850 hectares between Mentana, Fonte Nuova and Monterotondo, crossed by the Via Nomentana. It lies at 60 to 200 metres above sea level and holds small woods such as Bosco Trentani and Macchia Mancini alternating with farmland and built-up areas; the perimeter also encloses Mentana's historic centre. Soils are Pliocene-Pleistocene sands and clays, with tufa layers from the La Storta and Laziale volcanoes.

The reserve was established by regional law 29/97, enclosing woods such as Bosco Trentani and Macchia Mancini among farmland and built-up areas. Its perimeter takes in Mentana's historic centre, where the Museo Nazionale della Campagna dell'Agro Romano per la liberazione di Roma was set up in 1905 to commemorate the Garibaldian volunteers who fell at the Battle of Mentana on 3 November 1867. The Via Nomentana crosses the territory, recalling the ancient road that linked Rome to Nomentum.

The reserve takes its name from the ancient city of Nomentum, and its perimeter encloses the historic centre of Mentana. There, the Museo Nazionale della Campagna dell'Agro Romano per la liberazione di Roma, founded in 1905, commemorates the Garibaldian volunteers who fell at the Battle of Mentana on 3 November 1867. The Via Nomentana still crosses the protected land.

You can reach the reserve through the SS Salaria and SP Nomentana roads that pass through the area. Train connections from Roma Tiburtina station go to Mentana-Monterotondo, providing access to the protected zone.

The reserve's perimeter encloses the historic centre of Mentana, where the Museo Nazionale della Campagna dell'Agro Romano per la liberazione di Roma was set up in 1905 to commemorate the Garibaldini volunteers who fell at the Battle of Mentana on 3 November 1867. A stretch of hygrophilous oak wood with pedunculate oak (farnia) also survives inside the protected area.