Location and the Sirente group
The Sirente gives its name to a whole section of the central Apennines, bounded by the Aterno valley, the Subequana basin, the Forca Caruso pass, the Fucino basin and the Velino group. The summit itself lies in the municipality of Celano. In the Sirente-Velino group it is the fifth highest of the named peaks we list; the highest, Monte Velino (2,486 m), stands 19 km to the west across the Ovindoli plateau.
The main ridge carries several secondary tops: La Castellina (2,277 m) 1 km south-east, Punta Macerola (2,258 m) 1.3 km north-west and Monte San Nicola (2,012 m) 4.4 km south-east. On the north side the rocky Balzi del Sirente reach 2,025 m, with the Sperone dei Tiburtini (2,128 m) above them.
The north face and the gentle south
The contrast between the two sides is the mountain's signature. The southern slopes are an even ramp of pasture and karst — dolines, limestone pavement and false summits that hide the top until the last minutes. The northern side was shaped by glaciers in the Pleistocene: deep gullies (canaloni) such as the Canalone Majori and the Canalone della Vecchia cut through walls that look more like the Dolomites than the Apennines, with towers named Altare della Neviera, Peschio Pedone and Peschio Gaetano. Beech forest covers the lower north-east slopes.
Routes to the summit
From the south, Val d'Arano (normal route). The usual ascent starts above Ovindoli at the end of the paved road in Val d'Arano (about 1,340–1,390 m). Trail 13 (red and white) follows a mule track to the Bocchetta di Prato del Popolo (1,608 m), passes Monte Coppone (1,852 m) and continues over open karst ground to a small col at about 2,320 m and a short rocky ramp to the summit. The gain is about 950–1,000 m; allow around 3 h 15 min up and 5.5 to 7 hours for the round trip. VieNormali grades it EE (for experienced hikers): there are exposed rocky passages that are slippery when wet, and in cloud the many humps and the paint marks on rock make it easy to lose the line.
From the north, Valle Lupara. From the Chalet del Sirente (1,156 m) on the road between Rocca di Mezzo (13 km) and Secinaro (7 km), trails 15 and 18 climb the less steep Valle Lupara past a grassy basin at about 1,750 m, below the towers of the north face, to the summit ridge: about 1,170 m of gain, roughly 3 h 15 min up and 2 h 15 min down, graded E. The picnic area of Fonte all'Acqua is at the start. Experienced walkers can descend the steeper Canalone Majori, with long sections of loose scree.
Other approaches. Longer ascents start from Aielli in the west (about 1,300 m of gain) and Collarmele in the south (about 1,200 m). A shorter outing from Rovere (1,350 m) follows CAI trail 14A through a small gorge to the spring of Fonte Anatella (1,404 m) and up through beech woods to the Balzi del Sirente (2,025 m), about 780 m of gain, graded E. The unstaffed Rifugio della Vecchia shelter, built in the 1990s, stands on the north side at the head of the gully of the same name.
Winter and the gullies
In winter the southern normal route becomes a snowshoe or ski-touring ascent of around 1,000 m and 7 hours, depending on snow: carry avalanche transceiver, shovel and probe, and a GPS track, because the waymarks are painted on rocks that disappear under snow. The northern gullies are serious terrain. The Canalone del Sirente is a well-known ski-mountaineering line, and the Canalone della Vecchia reaches angles of around 60°; it is climbed in winter on consolidated snow with crampons and ice axe and is not recommended in autumn, when it is wet leaves and loose ground.
The Sirente crater
On the Prati del Sirente, at about 1,100 m below the north face, lies a small seasonal lake in an almost circular hollow about 115 by 140 m, with a rim raised 2.5–3 m above the plain. In the late 1990s the Swedish geologist Jens Ormö and colleagues, with the Italian geologist Angelo Pio Rossi, proposed that it is an impact crater left by a meteorite some 10 m across, surrounded by a field of smaller hollows. Radiocarbon dating of the buried soil points to the 4th–5th century AD, and a popular story even linked the impact to the sign the emperor Constantine saw before the battle of the Milvian Bridge in 312.
Not everyone agrees. In 2004 Fabrizio Speranza and colleagues argued that shepherds deepened a natural karst hollow into a pond for flocks on the transhumance route from Celano to Foggia. Later seismic and electrical surveys found a concave basin more than 50 m deep, hard to explain by karst alone, but in 2010 the Abruzzo region stopped the drilling that could have settled the question, and the origin is still debated.
The ice of the Neviera
In the Valle Serrata, a narrow cirque about 500 by 200 m enclosed by cliffs on the north-east side at around 2,000 m, snow lies late into summer, and a small snowfield survives most years. For generations the people of Secinaro, and also of Gagliano Aterno, climbed here at night to cut it. The ice was cut with axes into blocks of 50–60 kg, packed in chaff and dry beech leaves, wrapped in sacks and carried down by mules, up to 200 kg each, to an ice store at Goriano Sicoli, and from there to hospitals, markets and wealthy houses in Abruzzo, Lazio and Apulia along the old Celano–Foggia drove road. Secinaro's archives record the trade in 1874; it ended when mechanical refrigeration arrived.
Nature and the regional park
The Sirente-Velino Regional Park was created in 1989 and covers about 54,000 hectares in 22 municipalities; its seat is Villa Cidonio in Rocca di Mezzo. Wolves are present all year, and the Marsican brown bear has been recorded again since 2020, with females confirmed in 2021. Apennine chamois were brought back to the Sirente from the Maiella in 2013 and numbered some 65–70 animals by 2023. Red deer were reintroduced in 1990 and roe deer are common in the beech woods; the enclosure at Fonte Anatella holds fallow and roe deer before their release. Golden eagles, eagle owls and reintroduced griffon vultures fly over the cliffs. The park counts 1,926 plant species, among them glacial relics such as Saxifraga marginata and orchids like Nigritella widderi.
Weather and the best time to go
The walking season runs from June to October; spring brings snow on the upper slopes and winter turns the mountain into a mountaineering objective. Estimates from NASA POWER climate data give a summit mean of about 13 °C in the warmest month, July, and about −3 °C in January, with means above freezing from April to November — wind on the open ridge makes it feel much colder. Around the mountain about 800 mm of rain and snow falls a year; November is the wettest month and August the driest, but summer afternoons can still bring thunderstorms, so start early.
Practical tips
There is no water on the normal routes: take 1.5–3 litres from the start. The only spring on the approaches is low down: Fonte Anatella (1,404 m) on the route from Rovere. The summit is marked by a cross and a survey pillar, with a summit book. The 1:25,000 map Velino Sirente published by the CAI section of L'Aquila covers the whole group. Certified mountain guides in Italy belong to the Collegio Nazionale Guide Alpine Italiane (IFMGA); the national club is the Club Alpino Italiano, and in an emergency call 112 and ask for the Soccorso Alpino (CNSAS).
FAQ
How high is Monte Sirente? 2,348 m (2,349 m in some sources), with about 1,000 m of prominence.
How long does the ascent take? About 3 h 15 min up by either the Val d'Arano route from Ovindoli (950–1,000 m of gain) or Valle Lupara from the Chalet del Sirente (about 1,170 m); plan 5.5–7 hours for the round trip.
How difficult is it? The northern Valle Lupara route is graded E, the southern normal route EE because of exposed, slippery rock and tricky navigation in cloud. The northern gullies are winter mountaineering terrain.
Is there water on the way? No. Carry everything from the start; the only spring on the approaches, Fonte Anatella, is low down on the route from Rovere.
Is there mobile phone coverage? Coverage is patchy. OpenStreetMap shows three communication masts within 10 km, the nearest about 8.7 km south towards the Fucino basin, so a signal is more likely on the open south slopes and the summit than in the deep northern valleys. 112 reaches emergency services over any available network; download the map before you go.
Is the lake below the mountain really a meteorite crater? Possibly. The impact theory of Jens Ormö and colleagues dates it to the 4th–5th century AD; others think shepherds dug it out as a pond. Deep surveys support the impact idea, but drilling that could prove it has not been allowed.
When is the best time to climb Monte Sirente? From June to October for hiking. In winter only with snowshoes or skis, avalanche equipment and experience.