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Historic Routes across the Alps

The Alps form a major natural barrier that separates Italy from its northern and western neighbors. For more than 2,000 years however, peoples discovered and built ways across these mountains.

The Alps also have among the most spectacular landscapes in Europe. What could be better than exploring Europe’s history in such a setting?

This page shows the most important of these historic routes across the Alps and how they developed through history.

Mountain passes are the natural key points to cross a mountain range as the Alps. Their location and their approaches remain constant through history. This makes it particular interesting to understand how these routes changed over time and to visit them and look for traces of the past.

The summit of the Great St. Bernard Pass with the hospice buildings (Soumei Baba, Great St Bernard Pass, CC BY 2.0)


Interactive map of historic routes across the Alps

What are the most important routes today?

Brenner route

Interactive map of historic routes across the Alps

Map markers have pop-up windows with additional information. – Map controls: buttons for zoom and fullscreen in bottom left – keyboard +/- zoom as well – Map layers: change between terrain and classic OSM in top right.

Note: routes displayed here are current local roads, avoiding highways and tunnels where possible. Lötschberg and Septimer passes are exceptions as no roads exist there.

What are the most important routes today?

Taking freight volume as a measure (2004 combined road and rail figures), there are four Alps transit routes that are clearly the most important ones today:

  1. Brenner 42 mio t
  2. Gotthard 25 mio t (tunnels bypassing St Gotthard Pass)
  3. Fréjus 23 mio t (tunnels bypassing Mont Cenis Pass)
  4. Tauern 20 mio t (tunnels bypassing Radstädter Tauern Pass)

These four routes make up two-thirds of all trans-alp freight volume with the Brenner route alone contributing 25 %.

They also show, what makes a ‘good’ route across the Alps:

  • good approaches – all four routes have modern motorway approaches as well as railway lines
  • low crossing – of the four routes, the Brenner with 1,370 m has the highest crossing altitude. The other three routes go through tunnels between 1,100 and 1,200 m above sea level.
  • fully developed crossing – modern roads, bridges, tunnels, facilities. Some of this, we take for granted, but development played a major role historically.

Last but not least, these four routes give an idea of the general destinations of trans-Alp traffic.

  • The Brenner route brings traffic from south-east Germany to Italy,
  • The Gotthard route combines traffic from the Rhine valley area to Italy.
  • The Fréjus route connects Lyon and the Rhone valley with Italy.
  • The Tauern route is the best crossing between Germany and Carinthia as well as Slovenia and Croatia.

With this in mind, let’s have a look how the Brenner route became so important.


Brenner Route


The Brenner Pass is one of the lowest crossings of the main chain of the Alps. This geographical feature attracted travelers and trader early on and the Brenner was part of the Phoenician and Etruscan trade routes across the Alps that are known as Amber Routes.

Roman Roads

When the Romans conquered areas north of the Alps they also needed lines of communication across the mountains into southern Germany.

From Bolzano there were and still are two main routes to choose from:

  • West along the Adige valley toward the Reschen Pass. From this pass down into the Inn valley and then across the Fern Pass out of the mountains. – To the Romans this was known as Via Claudia Augusta
  • North-east along the Eisack valley toward the Brenner Pass. From there also down into the Inn valley. – To the Romans this was known as Via Raetia

The Romans first built a road over the Reschen Pass at 1,504 m to lead to the provincial capital at Augsburg. It was completed around 50 AD. About 100 years later, the trails leading across the Brenner at 1,370 m were improved into a Roman road as well. At Innsbruck, were it reached the Inn river, it forked to go to the East along the Inn Valley and to the North across the Seefeld Saddle and on to Augsburg. Both routes were used in the Roman Empire. When their rule broke down, road maintenance stopped for centuries and roads fell into disrepair.

Medieval times

Traffic between Italy and Germany continued to be important:

The north Italian kingdom of Lombardy came under Frankish and then German rule and communication with the church in Rome – the most important institution at the time – needed to be maintained.

The lack of road maintenance started to have consequences however. The Eisack Gorge east of Bolzano became more and more impassable. A local detour was established, which included another climb to 1,164 m at Lermoos. With this second mountain pass to cross, the route over the Reschen was preferred by travelers and traders.

The situation only changed, with a rare event of road building during medieval times. A local Bolzano merchant, Heinrich Kunter, was permitted in 1314 by his lord to improve the route through the Eisack Gorge. The Kunter’s Way changed the balance in favor of the Brenner again and around 100 years later 90 % of the traffic between Venice and Augsburg went across the Brenner.

From the 12th century onward, the area around the Brenner and the Reschen Passes consolidated into the county of Tyrol. While it was part of the Habsburg Empire for most of its history, it was split across the watersheds of the Brenner and Reschen Passes after the First World War. Today the northern part is part of Austria and the southern part is part of Italy. Both parts still share language and culture however and as part of the European Union form a cross-border Euroregion.

Modern developments

Traffic across the Brenner continued to be very important and improvements continued throughout the centuries. The railway across the Brenner was the second railway line across the Alps after the Semmeringbahn southwest of Vienna. It was completed in 1867.

The next major improvement was the Brenner motorway, which was one of the first mountain motorways in the World. It was built in the 1960s and 70s and carries most of the traffic across the Brenner today. The key structure of the Brenner motorway is the Europa Bridge. It was the highest bridge in Europe in the 1960s.

In 2007 work started for the Brenner base tunnel. This 55 km long railway tunnel will greatly improve the capacity and reduce the traffic impact to the local population around the Brenner.

historic routes across the alps
View of the busy Brenner Pass from above. The motorway, the railway and the old road converge on the highest point of the route. (Haneburger, Brennerpass from north, marked as public domain, more details on Wikimedia Commons)
Border crossing near the summit of the Reschen Pass.What was preferred over the Brenner during Roman and early medieval times is today an idyllic backwater in the mountains. (Llorenzi, DoganapassoResia, CC BY-SA 3.0 )
Explore! - Tips to explore the Brenner and Reschen Routes
There are cycling routes to explore both major historic routes:

Via Claudia Augusta cycling route – link
Eisack Valley cycling route – link

historic routes across the alps
The Europe Bridge, key structure of the Brenner motorway (Mnolf, Europabrücke (A13 Brennerautobahn), Blick Richtung Süden, CC BY-SA 3.0)

To be expanded…

– Various Wikipedia articles
– Herrmann, Schreiber, The History of Roads – From Amber Route to Motorway, Barrie and Rockliff, London, 1961
– Alpine Convention – Report on the State of the Alps – Alpine Signals – Special edition 1 – Transport and Mobility in the Alps – link
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