Zambla Alta

Sources do not agree on the elevation of Zambla Alta. ISTAT, in the territorial data for the 2011 and 2021 censuses, gives the village 1,197 metres; the Pro Loco of Oltre il Colle gives 1,150 metres; the elevation model used by Open-Meteo gives about 1,210 metres at the hamlet's coordinates, and the Pro Loco webcam pointed at Monte Alben is declared at 1,225 metres. These are not mistakes: the village climbs along the road, and each source takes a different point.

From the centre of the main village, piazza Tiraboschi, it is about 4.6 kilometres of provincial road, through Mincucco and past the turn-off for Zambla Bassa; the Colle di Zambla is a little higher, at 1,264 metres, and there the SP27 of Val Serina meets the SP46 that descends through Val del Riso to Ponte Nossa. The boundary with the municipality of Oneta runs just east of the pass. Between Zambla Bassa and Zambla Alta, just below the provincial road, ARPA Lombardia has run an automatic weather station, «Oltre il Colle Zambla», at 1,138 metres since January 2012: it measures temperature, precipitation, wind and snow depth.

Car parks in the village are small: OpenStreetMap maps one in via Santella, near the provincial road, and two spaces in via Fezzoli. For walkers the most convenient spot is the Colle di Zambla, which CAI Bergamo gives as the car park for trails 223, 238 and 501: the CAI speaks of a small car park at the roadside, while OpenStreetMap shows a free public area next to the bus terminus and, beside it, a lot reserved for customers of the Al Trapper restaurant. At the pass the same map also shows an electric-car charging point with two spaces.

For Capanna 2000 and the Arera, CAI Bergamo advises leaving the car at Plassa, in the Camping Arera area, about four kilometres above the village; OpenStreetMap maps three parking areas there, one of them paid. In summer you can drive up to the open area of the old Alpe Arera lifts, at around 1,600 metres, where parking is paid: OpenStreetMap and a 2023 hiking report give 4 euros at the machine, which OpenStreetMap places in the Plassa area: a figure to check on the spot. In winter the road beyond Plassa is closed to traffic and you set off on foot from there.

Zambla Alta is the hamlet with the most businesses. The Pro Loco lists a grocery, three restaurants (Miramonti, Neve and Quattro Cime), three bars, the Edo Sport shop renting ski gear, sledges, snowshoes, mountain bikes and via ferrata sets, the summer snow-tubing run at the Albergo Neve and horse-riding excursions with Walter Valley. To sleep there are the Albergo Neve, the B&Bs La Teresa and Atelier della Montagna, Camping Zambla and, at Plassa, Camping Arera; at the Passo di Zambla there is the B&B Il Nido.

At the pass you also find the Al Trapper restaurant and pizzeria, the La Baita bar, the Centro Sportivo Valle with mini golf, tennis, five-a-side football and trampolines, and the Parco Avventura Monte Alben. What is missing is a pharmacy, bank, post office and petrol station: they are in the main village, less than five kilometres away. Addresses, phone numbers and opening hours, where published, are on the Food and services and Where to stay pages.

Zambla Alta and Zambla Bassa appear as two of the municipality's five colonnelli (districts) as early as the sixteenth century, according to the historical record of Lombardia Beni Culturali, but for centuries they remained a single community, Zambla, with a single parish; the historical research of Massimo Maurizio, known as Pendughet, published by the Blog della Valserina, dates the division into the two present hamlets to the 1930s. The same research gives the oldest name, Zolambra, used when the inhabitants of Serina and Grimoldo bought the upper Val Serina on 4 May 1287, and links it to an area that was then dense forest.

The sources consulted for this guide do not offer a documented etymology of Zolambra or Zambla, so none is given here. The inhabitants are zamblesi, like those of Zambla Bassa. In religious terms, Zambla Alta's first step towards a life of its own was the permission of the Venetian Senate, dated 28 July 1712, to build a church dedicated to the Immaculate Conception.

Rather than a compact village, Zambla Alta is a line of houses along the provincial road with a few side streets: via Fezzoli, via Santella, via Morali, via Barozzo and via Monte Grem. Five minutes' walk north of the pass car park, CAI Bergamo points out a santella (wayside shrine) dedicated to the Madonna di Caravaggio, at 1,251 metres, on the route of trails 223 and 238; in the same village the CEI church census also records an eighteenth-century church of the Madonna di Caravaggio.

In this part of the municipality ISTAT counts only one separate inhabited cluster, Plassa, at 1,150 metres on the road to Alpe Arera: four people lived there in 2011, one in 2021. In 2011, however, ISTAT counted 148 dwellings there that were empty or used only by non-residents. Between the pass and the Passo della Crocetta (1,267 m) OpenStreetMap records uninhabited places such as Seriù and Calchera; higher up, on the climb to the Alben, is the Col dei Brassamonti, at 1,755 metres according to the CAI.

The municipality publishes only the total number of residents; figures by hamlet come from the censuses, which ISTAT processes by inhabited locality. Locality boundaries shift a little from one census to the next, so comparisons should be read as indicative. In 2011 the village of Zambla Alta had 151 residents, in 2021 138; over the same period the municipality went from 1,058 to 980 inhabitants, and the ISTAT estimate at 1 January 2026 is 920.

The figure that explains the village is its houses. In 2011 ISTAT counted 65 dwellings occupied by residents and 424 empty or used only by non-residents; in 2021 the census recorded 509 dwellings and 111 buildings. A third of the residential buildings counted in 2011 predate 1919, and a good third more date from the 1960s and 1970s, the years of holiday homes.

No official climate averages are published for Zambla. The figures below were worked out by this guide from the 1991-2020 daily data of Copernicus's ERA5 reanalysis, downloaded from the Open-Meteo historical archive: temperatures come from ERA5-Land (0.1° grid, about 10 kilometres) and are adjusted by Open-Meteo to the point's elevation of about 1,210 metres; precipitation and snow come from the 0.25° ERA5 grid, about 25 kilometres, and are the same for the whole basin. Snow means fresh snowfall, estimated by the model, not depth on the ground.

In short: average lows below zero from November to March, about 155 frost nights a year and 28 days when the temperature stays below zero even in daytime; cool summers, with average highs around 20 degrees in July and August; about 2,000 millimetres of precipitation a year, most of it between April and November; about two metres of fresh snow in an average season, but with very different winters, from 80 centimetres in 2006-07 to over four metres in 2013-14 in the same series.

These are reanalysis estimates, not measurements: a finer regional reanalysis, CERRA (5.5 kilometres), gives the main village milder winters, with January lows around −4 °C, and more precipitation, about 2,300 millimetres. The measured data of the ARPA station «Oltre il Colle Zambla» can be requested from ARPA Lombardia.

For walking, the season is the one CAI Bergamo gives for the area's trails, April to October. It still pays to set off early: in the ERA5 series the months from May to August are also the wettest of the year.

For snow the months are December to March, when on average most of the fresh snow falls, but whether the cross-country tracks open depends on the snow cover. Almost nine dwellings in ten have no residents, so outside holidays and weekends the village is very quiet: those looking for silence will find it, those needing services should check opening times first. The year's fixed festivals and races are on the Events page.

Zambla Alta is the coldest hamlet in the municipality: in the ERA5 series the average January low is about −9 °C, against −7 °C in the main village, and days with the high below zero number 28 a year against 17. On provincial roads, and so also on the SP27 and SP46 that lead here, the ordinance of the Province of Bergamo requires winter tyres or chains on board from 15 November to 15 April; with snow or ice on the road, chains must be fitted if you do not have winter tyres.

The municipal road beyond Plassa stays closed in winter, and anyone heading up to Capanna 2000 sets off from there on foot or on snowshoes. For the pharmacy and fuel you go down to the main village, home to the only petrol station in the upper Val Serina. Line B buses run up to Passo Zambla in winter too, Monday to Saturday; there are no services on Sundays and public holidays.