When Mountain Passes Open and Close

We drove four hours to the Grossglockner toll gate in the first week of May. The barrier was down. The sign said “geschlossen” – closed. The road was clear as far as we could see, the sky was blue, and the forecast was 18 degrees. But somewhere above 2,000 meters there was still enough snow to keep the plows busy, and the plows win the argument. The pass opened nine days later. We came back. It was worth it. But those nine days were a lesson in checking dates before checking fuel levels.

Mountain passes are seasonal roads. Snow closes them in winter, and the opening date varies by altitude, latitude, exposure, and the sheer volume of snow that fell between November and April. This guide covers when each pass in our eleven countries typically opens and closes, what makes dates shift from year to year, and where to check real-time status before you commit to the drive.

The Master Calendar

This table shows typical opening and closing dates for the major passes covered on SteepPass. “Typical” means averaged over recent years – individual years can vary by two to four weeks in either direction.

Pass	Country	Altitude	Typical Opening	Typical Closing
Furka Pass	Switzerland	2,429m	Early Jun	Mid Oct
Grimsel Pass	Switzerland	2,164m	Late May	Late Oct
Susten Pass	Switzerland	2,224m	Early Jun	Mid Oct
Gotthard Pass	Switzerland	2,106m	Late May	Late Oct
Grossglockner	Austria	2,504m	Early May	Early Nov
Silvretta	Austria	2,036m	Late May	Late Oct
Timmelsjoch	Austria	2,474m	Mid Jun	Mid Oct
Trollstigen	Norway	858m	Late May	Late Oct
Lysevegen	Norway	920m	Jun	Sep
Stalheimskleiva	Norway	380m	May	Oct
Transfagarasan	Romania	2,042m	Late Jun	Late Oct
Transalpina	Romania	2,145m	Late Jun	Late Oct
Tusheti Road	Georgia	2,926m	Jul	Sep
Cross Pass (GMH)	Georgia	2,379m	Year-round*	Year-round*
Durmitor Ring	Montenegro	~1,500m	Apr	Nov
Sedlo Pass	Montenegro	1,907m	May	Oct
Llogara Pass	Albania	1,027m	Year-round	Year-round
Vrsic Pass	Slovenia	1,611m	Late Apr	Nov
Mangrt Road	Slovenia	2,055m	Jun	Oct
Ovit Pass	Turkey	2,640m	Jun	Oct
Zigana Pass	Turkey	2,032m	Year-round*	Year-round*
Bjelasnica	Bosnia	~1,500m	May	Nov

*Year-round roads may have temporary closures due to avalanche risk, heavy snowfall, or maintenance. The Georgian Military Highway occasionally closes for hours or days in winter.

What Makes Dates Shift

Snowfall Volume

The primary variable. A winter with 150% of average snowfall pushes opening dates later by one to three weeks. The plows work at the same speed regardless – more snow simply means more days of plowing. The Grossglockner road authority clears approximately 2 million cubic meters of snow each spring. In a heavy year, that number goes up, and the opening date goes with it.

Altitude

Higher passes open later and close earlier. The relationship is roughly linear: for every 300 meters of additional altitude, expect opening to be delayed by one to two weeks. The Furka Pass at 2,429 meters typically opens two weeks after the Gotthard Pass at 2,106 meters, even though they are in the same country and the same mountain range.

Aspect and Exposure

North-facing slopes retain snow longer. A pass whose summit faces north will open later than one of equal altitude with a south-facing summit. The Timmelsjoch, despite being high, has relatively good sun exposure on its Austrian side, which helps with clearing. The Tusheti Road’s northern approach is the section that determines the opening date.

Road Authority Budget

This is the variable no one talks about. Clearing a mountain pass costs money – equipment, fuel, labor, barrier maintenance, safety inspections. Well-funded road authorities (Switzerland, Austria) open passes as early as conditions allow. Underfunded authorities may wait longer, even when conditions are ready. The Transfagarasan’s opening date is partly weather-dependent and partly bureaucracy-dependent.

Early Season vs Late Season

Early Season (Opening + 2 Weeks)

Advantages: Fewer tourists, empty roads, snow walls along the road at higher elevations (dramatic and photogenic), lower accommodation prices, cooler temperatures that are more comfortable for driving.

Disadvantages: Weather is less stable. Snow can return briefly at altitude, even in June. Some facilities (restaurants, viewpoints, fuel) may not yet be open. Road surface may still have winter debris – gravel washed across the road, small rockfalls not yet cleared. Passes sometimes close again temporarily after opening if conditions deteriorate.

Our take: Early season is excellent for experienced pass drivers who are flexible with their schedule. If you have fixed dates and cannot accommodate a temporary closure, add a buffer.

Peak Season (July-August)

Advantages: Maximum daylight, warmest temperatures, best road conditions, all facilities open, lowest chance of weather-related closures.

Disadvantages: Traffic. The Grossglockner in August sees over 4,000 vehicles per day. The Furka Pass gets queues at the hairpins. The Trollstigen has a bus every twelve minutes. Accommodation is at peak price and often fully booked. If you hate driving behind a campervan doing 20 km/h on a road with no overtaking opportunities, peak season will test your patience.

Late Season (Closing - 4 Weeks)

Advantages: Crowds thin dramatically after September 1. Autumn colors in the Alps and Balkans are extraordinary – golden larches against grey granite is the kind of scene that justifies the entire trip. Temperatures are comfortable, roads are dry, and the morning light has a quality that summer never matches.

Disadvantages: Days are shorter, which limits driving time. Weather becomes less predictable. Some passes close earlier than expected after the first heavy snowfall. Facilities begin closing – restaurants and viewpoint cafes shut before the road does. And the psychological pressure of knowing the pass could close any day adds an urgency that some people find stressful and others find exciting.

Our take: Late September through mid-October is the best time to drive Alpine passes. The ratio of scenic quality to tourist density is unbeatable. But have a backup plan.

Country-by-Country Details

Switzerland

Swiss pass management is precise. The road authority (ASTRA) publishes real-time status for every pass road. Opening dates are announced with one to two days notice based on clearing progress. Most passes open in stages – the lower approach roads first, the summit section last.

Check status: pass.ch – shows every Swiss pass with current status (open, closed, night closure, chains required).

Swiss passes sometimes have night closures in shoulder season: open during the day, closed 8 PM to 7 AM. This is a snow risk measure, not a traffic management choice.

Austria

The Grossglockner is managed as a toll road with a specific opening ceremony each spring. The date is typically announced in March or April. The Silvretta and Timmelsjoch are managed by different authorities and open independently.

Check status: grossglockner.at for the Grossglockner. Tirol road conditions for Tyrol passes. The Austrian automobile club OAMTC publishes a pass report during season.

Norway

Norwegian mountain roads have a unique factor: latitude. Trollstigen is at 62 degrees north, which means snow lingers despite the relatively modest altitude (858m summit). The roads are managed by the Norwegian Public Roads Administration, and opening decisions consider not just snow but also avalanche risk, which can keep roads closed even when the surface is clear.

Check status: vegvesen.no – the official Norwegian road authority with real-time pass status.

Romania

The Transfagarasan and Transalpina are managed by the national road authority (CNAIR). Opening dates are less predictable than in the Alps – official announcements sometimes come only days before, and the dates can shift based on political as well as meteorological factors. The highest sections (above 2,000m) typically open last.

Check status: There is no single reliable English-language source. Romanian driving forums and the CNAIR website (in Romanian) are the most current. Local accommodation providers near the passes often have the best real-time information.

Georgia

The Tusheti Road has the shortest season of any pass in this guide: typically July through September, sometimes extending into early October. The road authority checks conditions before declaring it open, and the decision is based on whether the road is physically passable, not whether it is safe by Western European standards. The Georgian Military Highway is maintained year-round but closes sporadically for avalanche clearing in winter.

Check status: No centralized reporting. The Tusheti guesthouse network and Georgian travel forums are the best sources. The police checkpoint at the base of the Tusheti Road will turn you away if the road is not declared open.

Balkans (Montenegro, Albania, Bosnia, Slovenia)

Lower-altitude passes in the Balkans have longer seasons, and some (Llogara Pass at 1,027m) are open year-round. Higher passes follow patterns similar to the Alps but with less formal management. Road closure in winter may simply mean that nobody has cleared the snow, rather than that a barrier has been deployed.

Slovenia is the exception: Vrsic Pass is well-managed with clear status reporting. Check: promet.si for real-time Slovenian road conditions.

Turkey

Eastern Turkish passes are high (Ovit at 2,640m) and remote. Winter closure is determined by snow conditions and the availability of clearing equipment, which can vary. The main highway tunnels that bypass the passes remain open year-round.

Iceland

Iceland’s highland roads (F-roads) are managed centrally and open only when inspected and deemed passable, usually in late June. Opening dates are published on the road authority website. Do not attempt F-roads before they are officially opened – you will be fined, and the rivers may not be safe to ford.

Check status: road.is – essential. Updated in real-time. Shows every road in Iceland.

Real-Time Status Checklist

Before driving to any seasonal pass, check these sources in this order:

1. Official road authority website (links above) – the definitive source
2. Local accommodation provider – call or email your hotel near the pass; they know the current situation
3. Google Maps traffic layer – shows real-time vehicle movement on the road; if cars are moving over the summit, the road is open
4. Social media / forums – recent trip reports from other drivers, especially in countries where official reporting is limited

Do not rely on guidebook dates, Wikipedia, or our table above as your sole source. These are typical ranges. The road opens when the road opens, and some years it is May 1, and some years it is June 3.

Planning Around Uncertainty

If your trip depends on a specific pass being open, build in flexibility:

• Buffer days. Add two to three days of slack around your target pass date. If the pass opens late, you have alternatives to fill the time.
• Backup routes. For every pass on your itinerary, know the alternative route. The Gotthard Tunnel replaces the Gotthard Pass. The A10 motorway bypasses the Tauern passes. Having a Plan B prevents a closed pass from ruining a trip.
• Direction flexibility. If you are driving a loop, being flexible about which direction you drive it means you can do the highest pass last, giving it the maximum time to open.

The seasonal table above is your starting point. The real-time sources are your confirmation. And the buffer days are your insurance. Mountain passes operate on their own schedule, and the schedule does not check your calendar.

Read the mountain driving essentials and car rental guide to prepare for what comes after the barrier lifts.