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Raven’s Tour (Korpinkierros) Wilderness Trail in Nuuksio National Park, Espoo

➡️ 8 km
🕒 2-3 h
⚫⚫⚪ Moderate
🔥 Campfire sites and cooking shelter
The route is marked with yellow markings on the trees, and the trail has signposts.

 

Korpinkierros, The “Raven’s Tour”, is a circular wilderness trail in the Nuuksio National Park. The trail is the most popular circular trail in Nuuksio. If you have only two hours time for Nuuksio, this route is what we highly recommend.  An eight-kilometer loop starts at the Haukanpesä information center, at Haukkalampi witch is easy to find and only 30 kilometres from the centre of Helsinki.

Korpinkierros | Nuuksio, Finland

The start of the trail passes through moss-covered terrain under spruce trees. As you approach Lake Mustalampi where you can see the turf floats on the pond, among other things. There is also the campfire site on the hill.

Korpinkierros | Nuuksio, Finland

After Lake Mustalampi, the trail rises on the Rajakallio hill and continues to vary, travelling through the forest. Next campfire sites at Lake Holma-Saarijärvi, one on an island, and another on the other right next to the shore on the other side of the lake.

Korpinkierros | Nuuksio, Finland

It takes a bit over two hours to walk the trail withtime to have occasional stops for the scenery. The untouched nature of the national park is the best part of the experience.A peaceful environment is good for hiking, not too difficult but slightly challenging. It’s also possible to walk only half the route if entering and exiting Nuuksio with different buses.

Korpinkierros | Nuuksio, Finland

Suitability

The trail is ideal for those looking for slightly challenging route with best views. There are a few short challenging sections on the trail: relatively steep hills and varying surface. Most of the trail goes over gently rising rocks and  duckboards, which both can be slippery to walk when wet. There are some wet spots on the trail but most of times it is possible to use normal light footwear on the trail.

How to get there?
Haukkalammentie 29
02820 Espoo
N60 18.581 E24 31.017

It is located only 30 km from the center of Helsinki. First take train line U from Helsinki Center Railway Station and go to the Espoo Center, Espoon keskus railway station. The train take about 32 minutes. From Espoon keskus take the bus number 245A, it will take you to the Nuuksio.

The Salpa Line trail

The Salpa Line is the largest construction project in Finland’s history. It was created as a deterrent, so that the enemy wouldn’t dare attack. The Finns suspected that the Soviet Union, not satisfied with the territorial gains they had made during the Winter War (1939–1940), would plan another invasion.

Built at the beginning of the 1940s in preparation for another war, The Salpa Line spans more than 1000km along Finland’s eastern border. It contains a total of 728 field fortifications either made from concrete or excavated from rock. Sweden provided assistance in the construction, both financially and in the form of manpower.

The line’s southern part was the most strongly fortified. The Salpa Line can be explored by following the South-East Salpa trail, which is a 50km one-way hiking route in Virolahti and Miehikkälä. There are points of interest suitable for everyone: formal museums, accessible roadside features as well as more hidden fortifications for the adventurous traveller, found off the beaten path.

For those interested in military history, the Salpa trail is an endless treasure trove. Along the trail are 13 picnic and overnight spots as well as 4 reservable saunas. A mountain bike is the ideal mode of transport for this route.

For the trail, wear good footwear and bring a powerful lamp, preferably two. The bunkers can be dangerous and dark places. There might be water on the floor or ice, even in the summer. The walls often have iron fixings and there can be metal rods poking down from the roof. Sewer lids might also be missing and some wooden structures may be rotten. Explore the bunkers at your own risk!

Almost all of The Salpa Line’s 25 caves are unfinished. They were intended to be accommodation dugouts for soldiers and regimental aid stations, where men injured in battle had their worst wounds dressed before sending them away from the front line for further treatment. With each step you can sense the past all around you.

5 points of interest on the Salpa line.

  1. Ventovuori area, Virolahti

The Salpa line’s best offering for the independent traveller. In a small area you will find three cave systems, a dugout and a petrol filling station. Map.

  1. Anti-tank barrier fence (dragon’s teeth)

Hundreds of miles long, this barrier, normally made from concrete blocks, is made with large blocks of excavated natural rock stacked several rows deep. For each rock, a hole was dug half a metre deep, leaving the rest of the rock poking out one metre above the ground. The fence can be seen in the yard of Virolahti’s bunker museum. Map

  1. Pääkaupunginkallio – The Capital’s Rock

A 14 metre high and 50 metre long vertical rock wall, from which stone was quarried for building materials. Map

  1. Klamila cannon batteries

The round cannon battery is a thought-provoking sight. This was the firing position for a 152/45 C -type gun. Ammunition stores, as well as accommodation facilities are located at its periphery. Map

  1. The Salpa Line Museum

There are many trails in the area, along which you can explore the history and construction of The Salpa Line. There’s an exhibition inside the museum as well as a short film. Other things to see include a wooden aircraft control tower and one of the better known tanks from the Second World War, the T-34. Map

5 CAVE SYSTEMS

  1. Salmenkylä tunnel, Hamina

A 20-metre-long cave, which is almost completely in its original condition. The floor is concrete and the furnaces and smoke ducts are made from moulded bricks. Map

  1. Lusikkovuori cave, Lappeenranta

The largest cave on the Salpa line is located in Lusikkovuori and was made by 400 men. In winter, icicles of up to one metre in height grow upward from the ground. The cave is open by request and can also be booked for private events and concerts. You can inquire about guided tours from Hilkka Suoanttila, tel. 040 565 4462. Map

Kuva: Jukka Siiskonen

Photo: Jukka Siiskonen / willimiehen jäljillä

  1. Vahtivuori cave

Vahtivuori cave is 32 meters long and meant for 80 persons. On the side of the accommodation tunnel is a machine gun chamber, and on top of the rock is a hemispherical lookout shelter. Map.

  1. Soikonvuori cave

The unfinished accommodation tunnel was excavated from the rock along with a dugout for two machine gun positions, where the walls and floors are covered in stearin and at one end stands a large wooden cross. It turns out that every year, a candlelit evening service is organised here.  Map

  1. Pallokorsu

A furnished round dugout, with pure white walls. It feels like being inside an eggshell. In the corner there is a small stove. and most of the space is taken up by a two-storey wooden gun carriage. Map

Things to note before a trip here

A wide range of guided day trips are organised on the Salpa Line. Services are provided by K-linnoiteretket and Korsumatkat Bunker Tours. In addition to these, a Salpa line hike is organised each year, where a small group of 10-15 participants can explore the terrain under the leadership of a trained guide.

If just walking or cycling along the Salpa trail, wear clothing appropriate for the weather and bring a packed lunch. In the summer be prepared for mosquitoes and other bugs, as well as vipers that might be found in the thickets.

In the dugouts there is no lighting. Entrances are generally low and thresholds high. Large chunks of rock can fall from cave walls and ceilings  and there may be other things hanging down, such as barbed wire. For photographing in dingy spaces a tripod and separate flash could be useful.

Some sites are on private land, in which case you should be aware of and remember Finnish Everyman’s Right.

The Salpa Line fortifications are protected under the Antiquities Law and their alteration, concealment, excavation or any form of deformation or vandalism is prohibited without the permission of the National Heritage Board.

The world ‘Salpa’, means ‘locking bolt’. The fortification line was intended to be the ‘lock’ on Finland’s defence, the final barrier if the Russian’s would have continued west. However The Salpa Line never had to receive a war, as they didn’t make it that far.

Historical sources used for this article were the work ‘Matkalla Salpalinjalle’ and leaflets from the museum.

Article by Harri Leino. Photos by Harri Leino, Virpi Bordi and Janne Lumikanta. Translated by Becky Hastings.