Grotta della Sibilla: how to get there and trails

Where the Grotta della Sibilla is

The Grotta della Sibilla lies in the upper part of Monte Sibilla, in the territory of Montemonaco (province of Ascoli Piceno), within the National Park of the Sibillini Mountains. To the north the mountain is bounded by the Val Tenna; to the south the ridge continues to Cima Vallelunga. It was Monte Sibilla that gave its name to the whole massif between Umbria and the Marche.

The cave opens just below the summit, which is 2,173 meters high. Reaching it means passing the Corona, the band of rock that circles the summit at about 2,100 meters. This band shapes the mountain's profile and makes it recognizable even from dozens of kilometers away. Above the small rock step is the terrace where the cave opens, now sealed by fallen boulders.

A few signs of its long history remain on site. Near the rock of the collapsed vestibule an engraved date can still be read: today it looks like 1378, but it may be a 1578 altered between the 17th and 18th centuries.

How to get to the Grotta della Sibilla and where to park

To get to the Grotta della Sibilla, first drive to the Rifugio Sibilla (1,540 m), where the trails start. From Montemonaco, follow the paved road toward Isola San Biagio and, after about 2 km, turn left onto the dirt road that climbs toward Monte Sibilla. The dirt road begins a few hundred meters from the hamlet of Collina. The parking area in front of the hut is the last point reachable by vehicle.

The road is not always open to cars. On summer public holidays only vehicles authorized by the Comune di Montemonaco may use it. The municipality runs a paid shuttle and, when the shuttle is running, closes the road to cars: for this reason it is wise to check the municipal ordinances before driving up. The shuttle from Montemonaco to the hut takes about half an hour. Some organized groups board it at Collina, where they leave their cars.

The Rifugio Sibilla belongs to the Comune di Montemonaco and is closed for renovation, so there are no services up there. Montemonaco is the last place to buy what you need, including water. In winter the drive up may not be possible: the road is often cut by landslides and, in the cold season, may be closed to vehicles because the area is exposed to avalanches.

Grotta della Sibilla hike: trails and routes

The most used trail to the Grotta della Sibilla is the Anello del Monte Sibilla (Monte Sibilla loop), which starts and ends at the Rifugio Sibilla. The Park lists it as route E10 and grades it EE (for expert hikers): it is 11.8 km long, takes about 4 hours and 10 minutes and has 710 meters of elevation gain. It can also be done as an out-and-back to the summit: about 2 hours up and an hour and a half down.

On the way up, follow trail 155. From the hut it climbs in steep switchbacks to the saddle below Monte Zampa, at 1,785 meters. From there it follows the long southwest ridge, which rises gently to the Corona. The rock band is passed with the help of a chain; on the left, where the slope eases, the remains of the cave can be seen, and a few meters higher is the summit of Monte Sibilla, at 2,173 meters.

The return follows the west ridge, on trail 156. The narrow ridge descends to a saddle at 2,129 meters between Cima Vallelunga and Monte Sibilla, where the dirt road arrives. Following the road leads back to the Rifugio Sibilla. This is the route of the mountain road built in the second half of the 20th century. Work was stopped after protests by environmental groups, when construction had already reached the top; the scar the road left on the eastern slope is called the "Z" of the Sibilla.

The stretch near the Corona is short but requires care. There the trail climbs a rock band a few meters high, on easy, non-exposed steps. The ridge section is more demanding: it takes good stamina, no fear of heights, some experience and sure footing on stones and gravel, because the ridge is narrow with vertical drops. The trail is in the sun all day and there is no water along the way: bring your own. Suitable boots, a windbreaker and food are also needed.

Best time to visit the Grotta della Sibilla

The best time to visit the Grotta della Sibilla is from late spring to fall. It is best to go up when there is no snow, that is, in late spring, summer and fall.

In summer, planning the day depends on the shuttle: find out in advance about the runs and the last return from the hut. Clear days are the best for the views from the ridge. In every season, check the weather before setting out: in wind or bad weather the ridge is less safe. In winter, with snow and the road often closed, the climb to the Grotta della Sibilla is no longer an ordinary hike.

What to see near the Grotta della Sibilla

The view from the ridge is the first thing to see near the Grotta della Sibilla. To the north, directly below, is the Infernaccio valley and beyond it Monte Priora; to the south the valley of Lago di Pilato and the Vettore; to the east the sea; to the west Monte Porche, Sasso Borghese and Cima Vallelunga.

Lago di Pilato is also part of the legend. In a parchment of 1452, kept in the historical archive of Montemonaco, the lake is called the "lago della Sibilla": knights came from Spain and the Kingdom of Naples to practice alchemy there. For helping these knights reach the lake and the cave, the whole population and the authorities of Montemonaco were excommunicated and then absolved in a trial.

In the historic center of Montemonaco, at Villa Curi, is the Sibyl's Cave Museum, dedicated to the myth. On display is the Gran Pietra (Great Stone), taken from Lago di Pilato, carved with the names of three knights from Spoleto who visited the lake around 1500. The museum is currently closed for restoration: the regional Conference approved a project to repair the building, as part of the reconstruction after the 2016-2017 earthquake. Before visiting, it is worth checking whether it has reopened.

The myth of the Sibyl appears in other places in the area too. Between 1610 and 1612 Martino Bonfini painted a cycle of twelve Sibyls in the Santuario della Madonna dell'Ambro, including a "Chemical" or "Alchemical" Sibyl. Until the end of the 17th century, in many hamlets around the Sibillini, roses and crosses were carved on stone lintels and doorways. Other caves of the massif, such as the Grotta dei Frati and the Grotta dell'Orso, are described on the page Caves of the Sibillini Mountains.