Welcome.
Though do take care as to the open / closed state of the roads, as the app / website relies on data it has received, in the same way as Google / Waze does. It is not a perfect science.
This data comes in various ways, anywhere between the local authorities advising of a road closure, through to real time data an app might receive back from its users on the ground. This can lead to misfits. For example:
ViaMichelin is showing that the Stelvio pass is currently open but that the neighbouring Umbrail pass is shut:
Google maps is showing that both passes are currently shut:
Of course if any app or website has no or insufficient data or no information from the local authorities, then the maps will default to what amounts to an ‘unknown’ status. In short, you’d need to go to that point on the road to find out for yourself what is happening, if anything.
Here’s an example, using the Col du Granier; Google (at least at the moment) has no idea of the road’s status:
The good news, is that the Col du Granier, is apparently open all year:
https://www.chartreuse-tourisme.com/en/touristic_sheet/col-du-granier-apremont-en-2716989/
But, by way of contrast, Google knows that the approach roads of the D916 (Col du l’Epine) a little away to the north-north-west are shut, just to the north of Saint Sulpice. Apparently, the pass was open until early December 2022, when it joined the growing list of shut passes:
https://www.ledauphine.com/transport/2022/12/07/fermeture-des-cols-de-l-epine-et-du-sapenay
Anyone who was planning / intending to use the Col du l’Epine today, would be disappointed or (even more dull) finding themselves turning around, even if other passes in the area might well be open. Similarly, if you ask what dates the Col du l’Elpine is open, you might get told:
From 15/04 to 31/10.
Depending on the weather.
In other words, the Col du l’Ipine shut
finally very late in 2022 - apparently, not until December - and it will probably still be shut in March 2023, staying closed until about mid-April…… the important words being:
Depending on the weather.
This whole thread shows the dangers inherent in asking “What’ll it be like, what’s the way to go?” type questions on any forum, especially several weeks (and in some cases, many months) in advance and on one as UK’centric as UKGSer.
The truth is nobody really knows, unless they happen to live there and can look out of the window (or drive to that spot) to report on what is the reality on the ground that very morning. You’ll get anything from “Every pass is shut until at least early June”, when of course not every pass is shut, through to “I went in - insert month, week or even day of choice - and it was 18 degrees, except when I went another year when it was -3C and the road was closed”. Not least (and this is regularly forgotten on these pages) some passes are open but only if the vehicle is fitted with snow tyres / chains. Both are impractical for the vast majority of motorcycles, obviously. Equally, bods report that they “Ignored the barriers and went up. It was great, mate”. Yes, it sometimes is indeed, ‘Great, mate’ and on other occasions it isn’t.
Enjoy your holiday, no matter what and do be sure to let us know how you get on, please.