Sandwiched in between the Lazio and Abruzza mountain ranges at the center of Italy lies the Sambruini Regional Natural Park. With peaks that reach over 2,000 meters (Monte Cotento), the rushing headwaters of the River Aniene, and over a hundred routes to be tackled in any season, Simbruini is a high end adventure experience.
Although the town of Subiaco may be a natural entrance into the region (and where many rafting expeditions on the Aniene will begin), there are a number of park offices throughout, including those at Monte Livata, Filey, and Cervara di Roma. The wilderness near the town of Vallepietra is known for a preponderance of short hikes that include the trail to the picturesque Comunacque Waterfall, while the elevations that surround Filey and the lovely Cervara di Roma are intriguing, and the skiing at Subiaco Monte Livata is the best in the region.
Do yourself the favor of translating their official page for a more extensive breakdown of hiking routes and areas of interest.