Liechtenstein is one mountainside and a floor won from the Rhine

How the whole of Liechtenstein fits on one slope

Liechtenstein lies roughly halfway along the northern edge of the outer arc of the Alps, an arc about 1,200 kilometres long, on the right bank of the Alpine Rhine. The Historisches Lexikon des Fürstentums Liechtenstein gives its area as 160.475 square kilometres, its length from north to south as 25 kilometres and its average width as about 6 kilometres. Wikipedia puts the length at about 24 kilometres. A survey of 2006 set the area at 160 square kilometres and the borders at 77.9 kilometres, which added 0.5 square kilometres of ground and 1.9 kilometres of border to the earlier figures.

Across those six kilometres of width the land climbs by about 2,000 metres. The Liechtenstein stretch of the Rhine valley lies at 430 to 490 metres above sea level, and the lowest point is the Ruggeller Riet in the far north, at 430 metres. The Grauspitz, in the south-east of the Rätikon massif, reaches 2,599 metres. The Lexikon's description of the country starts from that vertical division: a territory this small holds a wide range of the natural units of an Alpine valley side, stacked one above another.

There are two neighbouring states and three of their provinces. The Austrian state of Vorarlberg lies to the east, the Swiss canton of St. Gallen across the Rhine to the west and the canton of Graubünden to the south. Austria and Switzerland have no coast either, which makes Liechtenstein doubly landlocked; Wikipedia records one other country in that position, Uzbekistan.

The Lexikon divides the land into three belts of about equal size. This article follows them from the river upward.

What the Rhine built on the valley floor

During the last glaciation ice filled the Rhine valley and reached its greatest height about 24,000 years ago, at 1,500 to 1,800 metres above sea level. The Rhine glacier divided at the Gonzen near Sargans, one arm running west towards the Walensee and the other north along the present valley. When it withdrew, about 16,500 years ago, it left lakes behind, and the Rhine, its side streams and the debris flows known locally as Rüfen filled them in.

That fill is the ground Liechtenstein stands on. The Rhine gravel is almost 70 metres thick at Balzers in the south and thins to about 20 metres at Ruggell in the north, and under it lie the fine deposits of the former lakes. The river swung across the whole width of the valley, choked its own channels with gravel and broke out sideways in floods to find new ones. Streams fed by groundwater, the Giessen, formed a second network of water beside it. Away from the permeable gravel, backwaters silted up into fine sandy loam, and further from the river, around the Fläscherberg and the Eschnerberg, deep fens formed. About 30% of the Liechtenstein valley floor is moor soil.

Two hills stand out of the flat. The Eschnerberg in the north is about 7 kilometres long and 698 metres high, and the Fläscherberg in the south rises to 1,135 metres; Wikipedia assigns both to the Helvetic cover or flysch zone of the Alps. The Lexikon counts the Gutenberg hill at Balzers among the same island hills.

On the eastern edge, debris washed off the easily weathered flysch slopes built fans and cones out into the valley, and a rockslide after the ice age flattened the slope above Triesen and Triesenberg. Those cones, the island hills and the terraces at the foot of the Rätikon were the first places firm and dry enough to live on. Prehistoric roads and settlements kept to raised ground at the foot of mountains more than 2,000 metres high, or to the island hills, because the Rhine meandered through marsh below them. Old field terraces still show on the boundary between Vaduz and Triesen and in the Brüechliswald at Ruggell. The meadows, fields, vineyards and orchards stayed on those raised sites until the valley was drained in the 20th century.

How the Rhine became Liechtenstein's western border

The Rhine forms the whole western border, with the canton of St. Gallen. The Lexikon measures that stretch at 25 kilometres and Wikipedia at about 27. The river rises as two headstreams in Graubünden, runs about 90 kilometres as the Alpine Rhine from their confluence at Reichenau to Lake Constance, and drains a catchment of about 6,120 square kilometres there, of which about 2% is glaciated.

For centuries the river divided very little. The wide valley floor was mostly marsh and hard to cross, but its shallow water ran through lordships without cutting them. The counts of Werdenberg-Sargans held both banks until 1342, and parishes crossed the river too: Sennwald belonged to the parish of Bendern until 1422, Salez until 1512 and Haag until 1637. The Rhine became a boundary of lordship in the 15th century. After the Swabian War of 1499 separated the Swiss Confederates from the Habsburg sphere it was in effect the frontier of the Empire, and from the 1520s, when the territories on the left bank took up the Reformation, a confessional border as well.

Unregulated, the Alpine Rhine between Balzers and St. Margrethen wound and braided, with one main arm, one or two side arms, flat gravel islands and bays. In 1848 its mean width in the Werdenberg district was 227.4 metres, with a minimum of 120 and a maximum of 678. At low water it could be forded at Trübbach and at Triesen. Ferries were the surer crossing. A ship mill, a mill built on a large raft anchored to the bank, worked between Gamprin and Ruggell until 1856, timber was floated down the river until about 1870, and driftwood gave villagers free firewood. Bridges built from 1867 made the ferries redundant, and ferry service in Liechtenstein ended in 1918.

Why the dykes drew the line

Each commune protected its own bank with Wuhre, dykes angled out into the stream to deflect it. A dyke that turned the current away from one bank sent it against the other, and the Lexikon records many lawsuits between communes on opposite banks from the 15th to the 19th century. In 1471 the council of the city of Zürich arbitrated one between Schaan and Vaduz on one side and Buchs on the other. From 1650 the governments conducted the negotiations, and in 1753 the prince of Liechtenstein defended his dyke policy as protection of the frontier of the Holy Roman Empire.

Liechtenstein and St. Gallen began a provisional system of double dykes and inner embankments together in 1837. The treaty of 31 August 1847 fixed the national border, the bank lines and the direction of the dykes in one document and took 120 metres as the river's normal width. A Rhine dyke law of 16 October 1865 gave the government oversight of the works, and after the flood of 1868 the double dykes gave way to high dykes, which meant raising the Rhine bridges. Since the 1870s the river has been held to a channel 120 metres wide.

The communes paid at first, through dyke taxes of their own, and between 1856 and 1900 the Rhine communes of Liechtenstein spent more than 1.5 million gulden on the works. The state contributed from 1844 and the prince lent money. From 1891 the state carried 75% of the cost, and since 1990 it has carried all of it.

What the last Rhine flood left behind

The high dykes broke at Schaan, above the railway bridge to Buchs, on 25 September 1927. The Lexikon estimates the discharge of that flood at 2,700 cubic metres a second; the Alpine Rhine's annual mean flow is 157 cubic metres a second. The water scoured out the Gampriner Seelein, which Wikipedia describes as the one naturally formed lake in Liechtenstein. The Lexikon also records a breach above Vaduz on 28 June 1846.

How the drained fens filled with fields and towns

Drainage came slowly. The first attempts to drain the valley floor for farmland were made between 1834 and 1865, and together with the division of common land among citizens in the 18th and 19th centuries they took open arable land from about 370 hectares around 1800 to 1,530 hectares around 1870. The systematic drainage of the fens came with the inland canal, the Binnenkanal, which the Lexikon and Britannica date to the 1930s and Wikipedia to 1943. It runs parallel to the Rhine from the southern end of the country and enters the river in the north. In the mid-19th century 23 streams entered the Alpine Rhine from its right bank; after regulation six remain, and the canal is one of them.

Britannica describes the drained soils as highly suitable for agriculture, and the Lexikon describes the uniform green of intensive farming that now marks the valley. Houses followed the fields. The population tripled between 1945 and 2005, from 12,141 to 34,905. A building law of 1947 already provided for spatial planning, but generous building zones were laid out under it. Scattered building now covers about a third of the valley floor, and Triesen, Vaduz and Schaan have grown into one continuous band. The Lexikon lists dense industrial building and heavy through traffic among the floor's marks, and farmsteads have moved out of the villages into the fields. The old river-cut banks at the foot of the slope, along the old road between Balzers and Triesen and in the Haberfeld at Vaduz, are being built over. Avenues of tall fruit trees once announced a village; the start and end of a village are no longer marked.

What the gravel pits took from the river

Gravel was dug from the Rhine between 1953 and 1972, and the riverbed dropped by 4 to 5 metres. The groundwater table fell with it and the Giessen dried out. The Lexikon attributes to that digging, to regulation and to power stations upstream the loss of groundwater streams, fens and riverside woodland and a fall in the number of fish species. Of the 30 species originally present, 17 are still recorded in the Alpine Rhine, and 16 of those are at least potentially endangered.

A plan of 1979 and 1980 for five hydropower stages on the Rhine between Reichenau and Lake Constance was dropped on ecological grounds. Revival work began in the 1980s and nature reserves were designated, which the Lexikon judges an inadequate substitute. In 1995 Vorarlberg, St. Gallen, Graubünden and Liechtenstein founded the Internationale Regierungskommission Alpenrhein, and with the Internationale Rheinregulierung it drew up a development concept for the Alpine Rhine in 2005, covering flood safety, groundwater, ecology, settlement and recreation.

Why forest holds Liechtenstein's Rhine-facing slopes

The second belt rises from the foot of the slope to the Kulm, the ridge that forms the Rhine valley watershed, and forest covers most of it up to Alpine heights. Mixed broadleaf woods hold the ground above the valley floor up to about 700 to 800 metres, with pine on the debris cones. Beech begins to dominate at 600 metres and reaches about 1,200 metres on the sunny side. From about 1,400 metres spruce takes over and can form pure stands.

People blurred that sequence. Walser settlers from the Valais arrived around 1300, clearing in the mountains peaked after them, and the settlement terraces of Triesenberg and Planken were cut out of the forest. Steep ground cleared in the early modern period was used as hay mountain, cut for fodder. Wood pasture left open beech and oak woods, which survive in remnants on the Matilaberg and in the Gaselfawald at Triesen. Large clear-cuts and replanting from the 19th to the mid-20th century left even-aged woods, often pure spruce in place of the former broadleaf, above all in the Unterland. The highest pastures on this side are Gafadura, Bargella, Silum and Wang.

Britannica reports that all of Liechtenstein's forest is protected to keep the mountain slopes stable and to guard against erosion. The debris flows show why: the flysch weathers easily, and in the war and interwar years the state paid for Rüfe barriers, along with road building, as public work against unemployment. As farming has changed, many steep, lean meadows have stopped being mown, and around Triesenberg forest is growing back over them.

Where Liechtenstein's mountain valleys drain

The third belt lies east of the watershed, in the Rätikon. The chain runs between the Swiss Prättigau on one side and Liechtenstein and Vorarlberg on the other, from the Falknis at 2,562 metres in the west to the Silvretta group in the east, and its main ridge forms the border. The Naafkopf, at 2,570 metres, is where Liechtenstein, Graubünden and Vorarlberg meet, and the Grauspitz, at 2,599 metres, is the country's highest point. Wikipedia counts 32 mountains in Liechtenstein of at least 2,000 metres. The chain is Upper Jurassic and Cretaceous limestone of the East Alpine nappes, sitting on a folded base of Prättigau flysch from the Penninic nappes. Its name is a mistake: the Roman geographer Pomponius Mela, writing around AD 40 to 50, used the mountain name Retico, and in 1518 the St. Gallen humanist Vadian wrongly attached it to this chain, which kept it.

Water on this side leaves the country eastward. The Samina, about 10 kilometres long, rises at Triesenberg and flows into the Ill in Austria near Feldkirch, and Britannica names it as the river that drains the mountains. It meets the Rhine through the Ill, whose mouth lies at Bangs in Vorarlberg. The mountains of Liechtenstein therefore drain through Austria to reach the river that forms Liechtenstein's own western border.

Above and below the tree line, which runs at 1,800 to 1,900 metres, alpine pastures take any ground that can be grazed, and Britannica records that the slopes are grazed in summer. Gross- and Kleinsteg keep their two traditional rings of settlement. The Malbun valley has been shaped since the 1960s by winter sport, hotels and ski lifts. In the lower Samina valley the Lexikon describes a wilderness that people have barely touched for many decades. The Saminawerk power station opened in 1949, and Wikipedia records reservoirs, used mainly to generate electricity, of which the Steg reservoir is one.

How the foehn shapes Liechtenstein's climate

Britannica and Wikipedia both describe the climate as mild for mountain country, and both give the same reason: the foehn, a warm, dry southerly wind. It lengthens the growing season in spring and in autumn, and Wikipedia reports that temperatures around 15 °C are not unusual on strong foehn days even in winter. The ranges of Switzerland and Vorarlberg upstream shield the valley from cold polar and Atlantic air.

Winter temperatures rarely fall below −15 °C, and summer daily maxima average 20 to 28 °C. Annual precipitation runs from about 900 to 1,200 millimetres depending on location and reaches 1,900 millimetres in parts of the mountains. Wikipedia puts average sunshine at about 1,600 hours a year.

Wikipedia notes that the small area makes little climatic difference while the vertical division makes a large one. The Lexikon describes warmth-loving vegetation on the south-west-facing Rhine side and, beyond the Kulm, alpine grassland, rock bands and snow. On the valley floor the climate allows grapes and maize, which Britannica calls unusual in a mountainous area, and Wikipedia records orchards and a long tradition of winegrowing.

Why the north of Liechtenstein is the lower land

Liechtenstein's two halves are named for the direction the Rhine flows. Upstream, in the south, is the Oberland; downstream, in the north, is the Unterland. The Oberland is the former county of Vaduz, 125.478 square kilometres or 78.2% of the land, with the six communes of Balzers, Triesen, Triesenberg, Vaduz, Schaan and Planken. The Unterland is the former lordship of Schellenberg, 34.996 square kilometres or 21.8%, with five communes on and around the Eschnerberg: Eschen, Mauren, Gamprin, Ruggell and Schellenberg. In 2007 the Oberland had 22,970 inhabitants and the Unterland 12,386, a split of 65.0% to 35.0%.

The formal boundary is the Scheidgraben, a ditch that hardly shows in the landscape now. The clear line on the ground is the fen: a stretch of Ried lies between the two settled areas and keeps them apart. The terrace communes of Triesenberg and Planken both belong to the Oberland, while the Unterland is valley floor and island hill.

The whole country had 38,020 inhabitants on 1 January 2019, and Britannica estimates 42,300 for 2026, a density of 264.4 people per square kilometre. Vaduz had 5,668 inhabitants on 30 June 2019. The World Bank counted 14.6% of the population as urban in 2025.