🇫🇮 Finland · Lakeland
Lake Saimaa is not just a lake: it is a world of water. The largest lake in Finland and the fourth largest freshwater lake in Europe, it is in fact an unfathomable maze of basins, bays, straits and islands — some 14,000 of them — covered in forest, spreading across the whole southeast of the country. Here the line between land and water blurs into an endless puzzle of peninsulas, channels and mirrors of the purest water, one of the most characteristic and best loved landscapes in Finland.
Saimaa is the heart of Finnish 'Lakeland', the lake district, and the very essence of the Nordic summer: wooden cabins (the legendary mökki) hidden among pines at the water's edge, steaming saunas by the lake, rowing boats, kayaks, jetties for jumping into the cool water and nights when the sun barely sets. It is a destination for slowing down, breathing, boating and getting lost among islands, far from the rush.
The lake also holds a unique treasure: the Saimaa ringed seal, a species that exists only here, cut off from the sea since the last ice age and now endangered. Charming towns are scattered around Saimaa — Savonlinna and its castle, Lappeenranta, Imatra — along with national parks of pristine nature. This guide tells you what to see and do on the great lake, how to get there and get around, what it costs and how to live the Saimaa experience, planned above all for the bright summer.
Lake Saimaa formed at the end of the last ice age, some 10,000 years ago, when the retreat of the ice and movements of the earth's crust left this enormous network of freshwater basins. In that isolation the Saimaa ringed seal was trapped, and it evolved as a unique freshwater species. For centuries, Saimaa was the great transport route of eastern Finland: its waters connected villages, carried timber and goods, and in 1856 the great Saimaa Canal opened, linking the lake with the Gulf of Finland and the Baltic Sea and boosting trade. The region, bordering Russia and tied to Karelia, lived the wars of the 20th century at close quarters. Today Saimaa is a nature destination and a symbol of the Finland of the lakes. The full history is on our history page.
Read the full history ↓The inland world of forest and water where the Finnish soul was forged: the Karelia of the Kalevala, the industry of Tampere and the thousands of islands of Lake Saimaa.
Read the history of Lakeland →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
The story of Saimaa begins with ice. Some 10,000 years ago, at the end of the last ice age, a gigantic ice sheet covered all of Finland. As the glaciers retreated, they left behind a landscape moulded by ice: hollowed-out basins, moraines, gravel ridges (eskers, such as the famous Punkaharju) and an enormous amount of water trapped in the depressions. That is how the lake network of southeastern Finland was born, the one we now know as Saimaa, a maze of interconnected basins.
The process was not static: the land, relieved of the weight of the ice, went on rising (a phenomenon called isostatic rebound that continues today), and that altered the drainage of the waters over millennia. At some point, Saimaa was cut off from the Baltic Sea, becoming a closed freshwater system.
That isolation had an extraordinary consequence: a population of ringed seals, which had lived in the sea, was trapped in the lake when it separated from the Baltic. Isolated for thousands of years, those seals evolved into a species of their own, the Saimaa ringed seal (Saimaannorppa), which exists nowhere else in the world. It is one of the few freshwater mammals of its kind, and today a symbol of the lake and of nature conservation in Finland. Saimaa, then, is not only a product of the ice age: it is home to a living creature the glaciation itself left behind as a legacy.
Human beings reached the shores of Saimaa very early, following the retreat of the ice. On its banks and cliffs there are prehistoric rock paintings thousands of years old, such as those at Astuvansalmi, showing human figures, animals and boats: evidence of the communities of hunters, fishers and gatherers who lived off the lake and the forest. Saimaa, rich in fish and ringed by generous forests, was always a favourable place for human life.
Over the centuries, the region became tied to Karelia, the land stretching on both sides of the present border between Finland and Russia, with its own culture, language and traditions. It was also a frontier zone disputed between the Swedish-Western world and the Russian-Orthodox one, a tension that would shape its history for centuries (and that led, for example, to the building of Olavinlinna castle in Savonlinna in 1475).
For the people of eastern Finland, Saimaa was for centuries the great route of communication. In a land of dense forest with barely any roads, water was the motorway: people, livestock, furs, tar, butter and, above all, timber moved across the lake. Logs were floated to the sawmills and the ports. The life of the lakeside villages revolved around the lake, which was at once larder, road and frontier.
The great leap in Saimaa's economic history came in the 19th century, when Finland was the autonomous Grand Duchy within the Russian Empire. The lake, despite its size, had a problem: it was closed, with no direct outlet to the sea, which severely limited trade for a region rich in timber but isolated. The solution was a great feat of engineering: the Saimaa Canal (Saimaan kanava), opened in 1856 after years of construction.
The canal, some 43 kilometres long with several locks, linked the southern end of Lake Saimaa with the Gulf of Finland, on the Baltic, near the city of Vyborg (then Finnish, today in Russia). At a stroke, the immense lake network of eastern Finland was connected to the sea and to international trade routes. It was a revolution for the region's economy: timber and other inland products could be exported by ship, and sawmills, industries and towns flourished on the lake shore.
The canal drove the development of towns such as Lappeenranta and Imatra, and turned Saimaa into a first-rate commercial artery. It also opened the lake to early tourism: as early as the 19th century, travellers and aristocrats came to admire the Imatra rapids or the beauty of Punkaharju, drawn by the northern landscape. Saimaa stopped being merely a remote lake and became an economic engine and an admired destination.
The 20th century brought to the Saimaa region the upheavals of war and of the border with the Soviet Union. After Finland's independence (1917), the southern part of the lake lay very close to the great neighbour to the east. Everything changed with the Second World War. In the Winter War (1939-1940) and the Continuation War (1941-1944), Finland fought the USSR, and one consequence of the conflict was the loss of large territories in Karelia, including the city of Vyborg (Viipuri), which had been Finland's second city and which ended up on the Soviet side.
That new border cut the Saimaa Canal: its final stretch, out to the sea, was now in Soviet territory. In addition, more than 400,000 Finnish Karelians had to leave their homes in the ceded territories and take refuge in the rest of Finland, an enormous exodus that marked an entire generation and reinforced Karelian culture in the part of the Saimaa region that remained Finnish. The mark of Karelia — its food, with the Karelian pasties; its music; its traditions — is still very much alive on the Finnish shores of the lake.
During the Cold War, Finland kept its independence and its democracy through a policy of prudence towards Moscow. In 1963, at the height of détente, the USSR agreed to lease the Soviet stretch of the Saimaa Canal to Finland, which allowed it to reopen to traffic. So for decades the region lived the peculiar situation of a Finnish lake whose outlet to the sea ran through the territory of the neighbouring superpower, a reflection of the country's delicate geopolitical position.
In recent decades, Saimaa's role has changed again. The timber industry is still present, but the lake has become, above all, a major destination for nature and wellness tourism, one of the emblems of Finnish 'Lakeland'. Its combination of the purest water, thousands of wooded islands, summer cabins, saunas and silence draws Finns and a growing number of international visitors looking for the quiet, natural essence of Finland, far from the big cities.
Nature conservation has become central. The Saimaa ringed seal, which came close to extinction, is today the symbol of an intense protection effort: national parks have been created (such as Linnansaari and Kolovesi), the fishing gear that threatens it is regulated and its breeding areas are protected, even with volunteers building snow shelters for its pups in mild winters. Thanks to that, the seal population, though still very small and fragile, has begun to recover slowly. The seal has become a national icon and a responsible tourist draw.
Saimaa also looks to the future with sustainability projects, and its candidacies and recognitions as a geotourism destination (it was named a European Region of Gastronomy and aspires to greater Unesco recognition for its geology and nature) reinforce its standing. Today, the great lake born of ice, which was a disputed frontier, a trading route and a theatre of war, is above all a sanctuary of water and forest: the place where Finland keeps its most intimate relationship with nature and where a seal found nowhere else in the world still swims among the islands.