We have been recommending September on this site for months, and until now we did it the way everyone does: because it is finer, quieter, clearer. From today we can lean on something less vague.
Since 1 June we have recorded, hour by hour, how many spaces are left in the Dolomite car parks that publish them. That is three months of measurements, and the arc they describe is sharp.
September we have not measured yet, obviously, and we will not pretend otherwise. But we have June, which in the tourism calendar is the mirror month, and we have August by contrast.
The arc of the summer, in three numbers
The Sella Pass is where it shows best, because it has 199 spaces and almost everyone stops there. Across the valid days we recorded, the car park hit zero spaces on 6 days out of 21 in June, on 24 out of 30 in July and on 21 out of 23 in August.
Translated: from 29 per cent of days to 91. And it is not only the frequency that changes, it is the hour: the first hour of full goes from 8.30 in June to 7.55 in July and 7.34 in August. Fifty-six minutes between the first month and the last, which is exactly the margin that decides whether you find a space.
The same movement shows everywhere, at different amplitudes. The Mont Sëuc garage in Ortisei goes from no full days in June to 68 per cent in August. Sciuz from 3 to 52. The Monte Pana car park, which never filled in June or July, hit zero on 9 days out of 23 in August.
- Sella Pass: 29% of days full in June, 80% in July, 91% in August
- First hour of full at the Sella: 8.30 in June, 7.55 in July, 7.34 in August
- Mont Sëuc garage, Ortisei: 0%, then 29%, then 68%
- Sciuz: 3%, then 23%, then 52%
- Monte Pana: never full until July, 39% in August
Why June says something about September
June and September are the two months that sit just outside the Italian and German school holidays, and that is the variable governing the curve. Not the weather, not the leftover snow: the school calendar.
If in June the Sella Pass fills on fewer than a third of days and does so half an hour later, the same dynamic is reasonably expected in September, with two things June does not have: days still long enough, and paths entirely clear of snow, which in early June at altitude is far from guaranteed.
That is a forecast, not a measurement, and we keep it separate from the figures above. We will record September day by day as we did the summer, and publish the comparison as soon as we have enough days for it to hold.
The restrictions that lapse, with dates
There is a practical side to September almost nobody lines up: it is the month when the access regimes built for the high season switch off one after another. These are verified dates, and they change how you plan a day.
At Lake Braies the access regulation runs to 15 September: until then, between 9 and 16, you enter the valley only with a booking or by public transport. After that you go back to entering and paying for parking on the spot. That is the difference between forty-four euros booked six days ahead and an ordinary barrier.
Dolomitibus line 51 from Cortina to the Tre Croci Pass, which is the civilised way to reach Lake Sorapis, ends on 9 September: from then on you go back by car, with everything that implies at a small car park whose rules nobody publishes.
On the Alpe di Siusi, by contrast, nothing changes for a good while: the cable car runs to 2 November, and while it runs the road stays closed from 9 to 17. The Tre Cime road also stays open into October.
- 15 September: the access regulation at Lake Braies ends
- 9 September: last run of line 51 to the Tre Croci Pass
- 2 November: until then the Alpe di Siusi cable car runs, and the road stays closed 9 to 17
- October: the Tre Cime toll road usually closes then, with the snow
What we threw away, and why we are telling you
Preparing these figures we found a mistake of our own, and since the site rests on its data it is worth telling rather than quietly fixing.
A sensor that stops counting does not report zero: it keeps reporting the car park's nominal capacity, for all twenty-four hours. A day like that looks like a perfectly empty car park, and our plausibility check let it through, because it was built to catch the opposite case, a sensor stuck on full at night.
Out of 545 days recorded, 122 were flat. The Passo Gardena sensor was flat on all eighty-six of its days, meaning it has never worked since we started watching it. At the Sella Pass the flat days numbered twelve, clustered in early June: they made June look emptier than it really was.
We fixed the check, re-flagged the history and redid the sums. Every figure on this page is the corrected one, computed on 418 valid days rather than 545. The method, and what happens when a figure does not hold, are on the page about the data we check.
If you come in September, what actually changes
The first thing is that the alarm clock moves. If in August the only safe window at the Sella Pass is before 7, in September the margin widens: by how much we will say with numbers in a few weeks, but we know the direction.
The second is that the days shorten. By mid September darkness comes early, and a route that sat comfortably in a day in August needs rechecking: it is the time of year when people most often get back wearing a head torch.
The third is that things start closing. Huts, lifts and alpine dairies have different closing dates and not all of them are published, so before building a day around a hut it is worth phoning. That is not a ritual formula: it is the part where open data does not reach.
For the rest, what we write in the guide on when to go and in the analysis of summer crowding still holds, and we update it as the series grows.
Frequently asked questions
Is September really less crowded than August in the Dolomites?
We do not have September's figures yet, but we do have June's, and it is the mirror month in the holiday calendar: at the Sella Pass the car park filled on 29 per cent of June days against 91 per cent in August, and half an hour later. The real comparison with September will be published as soon as we have enough recorded days.
What time do you need to reach the passes in September?
In August the only safe window at the Sella Pass is before 7, because the car park fills on average at 7.34. In June the first hour of full was 8.30. In September the margin widens, but by how much we will say with data, not by feel.
What changes in the access rules in September?
On 15 September the access regulation at Lake Braies ends, so you go back to entering the valley by paying for parking instead of booking. On 9 September Dolomitibus line 51 to the Tre Croci Pass stops. On the Alpe di Siusi, by contrast, the road stays closed from 9 to 17 as long as the cable car runs, that is until 2 November.
Are there risks in going in September?
Two, concrete. The days shorten and a route that sat comfortably in August can end in the dark. And huts, lifts and alpine dairies start to close, on different dates and not all published: if the day depends on a hut, phone ahead.
Where do these numbers come from?
From the hourly series we have recorded since 1 June 2026 on the car parks that publish their free spaces in real time, using the open data of the autonomous Province of Bolzano. They are computed on 418 valid days: we discarded the other 122 because the sensors were stuck, and at the foot of the page we explain how we noticed.