The Petit Saint-Bernard Pass officially reopened on May 24, 2026, two days later than scheduled. This season is unlike previous ones: a structural project initiated in 2025 on the Savoy side requires alternating one-way traffic on a section of the road, and coordination between France and the Aosta Valley showed its limits from the very first days.
Opening Delay Between the French and Italian Sides in 2026
ANAS, the road network manager on the Aosta Valley side, opened the SS26 up to the border on May 22, 2026, in accordance with the planned date. The Savoie Department maintained the closure on the French side due to a snow risk classified as “very high”, creating a two-day delay between the two sides.
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This type of situation is not theoretical: a motorist arriving from the Aosta Valley on May 22 found themselves blocked at the summit, with no possibility of descending towards Tarentaise. The information on the Italian side did not indicate the French closure, raising the question of a coordinated cross-border information system. To find out if the Petit Saint-Bernard Pass is open or closed in 2026 on a given date, one must check both sides separately.
The full opening only occurred on May 24, 2026, after a reassessment of the avalanche risk by departmental services. Field reports vary on this point: some users reported being notified too late about the postponement.
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Structural Works and Alternating Traffic on the Pass Road
The 2026 reopening is taking place under special conditions. The Savoie Department has initiated a major project to strengthen the road platform on the French side, with the first works starting in autumn 2025. The closure had actually been advanced to September 20, 2025, several weeks earlier than usual.
The urgency of this project was summarized by departmental authorities in a straightforward statement: “either we did it this year, or we would lose the road”. The degradation of the roadway threatened the very sustainability of road access to the pass.
What Alternating Traffic Means for Users
Traffic is conducted in alternating one-way on the section under construction. This implies variable waiting times depending on the time slots and traffic volume. Wide vehicles (motorhomes, vehicles with trailers) are particularly affected by these restrictions.
- The alternating section is located on the Savoy side, between Séez and the summit of the pass
- Passing times may vary according to the progress of the works, with no guarantee of regularity from one week to the next
- Motorcycles and bicycles pass in the flow of traffic, without a dedicated lane or separate time slot
The available data does not specify the expected duration of this alternating traffic. The Department has not communicated a firm end date for the works for the 2026 season.
Anticipated Autumn Closures: A Confirmed Trend
The Petit Saint-Bernard Pass closes every year in autumn when weather conditions no longer allow for safe road maintenance. The 2025 closure on September 20 set a precedent: several weeks ahead of the usual schedule, justified by the need to start reinforcement works before winter.
Departmental authorities indicate that the opening and closing schedule of the pass is now conditioned as much by the works as by the weather. This means that an early closure in September or early October could happen again in 2026, depending on the progress of the works.
For users planning to pass at the end of the season (September or even early October), this uncertainty changes the game. A trip planned around the pass in mid-September no longer offers the same margin of safety as it did a few years ago.
Alternative Routes When the Petit Saint-Bernard Pass is Closed
When the pass is inaccessible (winter closure, spring opening delay, works), options for connecting Tarentaise to the Aosta Valley are reduced to two main routes.
Mont-Blanc Tunnel
The Mont-Blanc Tunnel connects Chamonix to Courmayeur and remains the most direct alternative. It is toll-based, with specific restrictions for certain categories of vehicles. During peak summer periods, waiting times can be significant. The tunnel is subject to scheduled closures for maintenance, which requires checking its accessibility before any departure.
Col du Mont-Cenis and Grand-Saint-Bernard
The Mont-Cenis Pass (Savoie to Piedmont) offers a free crossing but adds a significant detour to reach the Aosta Valley. Its seasonal opening follows a schedule comparable to that of the Petit Saint-Bernard.
- The Grand-Saint-Bernard Pass (Switzerland) allows access to the Aosta Valley via Martigny, with a road tunnel open year-round and a pass road open in season
- Passing through Switzerland requires a motorway vignette and a longer route from Savoie
- For vehicles with trailers, the Grand-Saint-Bernard Tunnel has size restrictions to check
None of these routes exactly replace the Petit Saint-Bernard in terms of layout and scenery. The choice depends on the starting point, type of vehicle, and toll tolerance.
What the 2026 Season Reveals About the Future of This Access
The ongoing works on the Savoy side are not routine maintenance. They are a safeguarding intervention aimed at preventing the permanent loss of the road. The Petit Saint-Bernard Pass is entering a period where its accessibility depends on public investment decisions, not just on the weather.
The question of the profitability of these heavy works arises in a context where the Mont-Blanc Tunnel captures the majority of transalpine traffic between Savoie and the Aosta Valley. The pass remains a valued tourist and cycling route, but maintaining it in a drivable condition represents a recurring cost for the Department.
The 2026 season, with its delayed opening, alternating traffic, and the prospect of another early closure in autumn, provides a glimpse of what could become the norm for the coming years.