Torronsuo National Park, Finland’s deepest bog

Torronsuo National Park in Tammela Finland

Torronsuo National Park is the closest national park to where I grew up and I have visited it many times. It is one of my favorite locations to go for a walk on the duckboards and I like to go cross-country skiing on the bog in the winters. I have my secret spots for cranberry picking and I occasionally like to climb to one of its birdwatching towers at Kiljamo.

On a good winter during the months of January-March Torronsuo might have up to 45 kilometers of tracks for cross-country skiing. I recall one full moon skiing trip when I was young, around 8 years old. My parents took me to this trip organized by Suomen Latu, the outdoor association of Finland. It was all so exciting because we packed some snacks with us and went there in the evening, in the dark. We had some flashlights but there was a full moon guiding the way. I had been told that it was a 10 km trip and there was a big bonfire at the end of the first 5 km leg. I was a avid skier but it was a long trip for my age. I was looking forward to the bonfire from the beginning of the journey. Skiing in the forest was familiar to me and I was used to small hills, but the bog surprised me as it was totally flat. I got bored pretty early on. Because we were skiing in the dark, it felt like we were not making any progress at all. I don’t know how I ever got back home from there, but I remember being happy seeing the bonfire!

That delightful skiing trip memory has not kept me away from Torronsuo. In fact, I was there again last week, enjoying the fresh autumn air.

Torronsuo offers a couple of different tracks for walking. The short track of 1,5 kilometers leaves from the information board next to the parking lot. It guides you on the duckboards through the forest to the bog, leading you to Kiljamo birdwatching tower. There are only few hundred meters back to the parking lot from there. The beginning of the short track also has a wheelchair accessible part and a new accessible section will be built at the end of 2020.

If you want to venture further out, there is about 3,5 kilometers long duckboard path leaving from the short track to an old quarry. Quarry is louhos in Finnish. That quarry used to provide quartz to Åvik glass factory in Somero, a neighboring city to Tammela. Torro is the name of the village on the other side of the bog and Torronsuo literally means Torro’s bog. From the quarry you need to walk back to Kiljamo or continue around the bog along the circle trail, which is about 10 kilometers in total.

The cranberry season is about to begin. You are allowed to pick berries and mushrooms in Torronsuo National Park as Finland’s legal concept of everyman’s right gives everyone the chance to enjoy berry picking. With the freedom to enjoy the countryside comes the obligation to leave the environment undisturbed. You are allowed to make a fire at Kiljamo fireplace, unless the forest fire warning has been announced. During the breeding season of the birds, from April to August, it is recommended to stay on the paths. The dogs are welcome but should be on leash.

Torronsuo is an important breeding area for the birds. The birdwatching tower at Kiljamo is popular especially when many birds such as cranes are migrating. It is estimated that there are approximately 40,000 pairs of cranes breeding in Finland. These large long-necked and long-legged birds can be seen migrating in large and noisy V-shaped flocks. Usually cranes are leaving Finland between August and October and return in March–May.

There are about 500 kilometers of duckboards in Finland. In 2020, there are brand new duckboards at Torronsuo. We are so grateful that they are kept in a good condition, allowing us to wander deeper into to the bog. This time on my walk I spotted the only poisonous snake we have, viper, bathing in the sun on the duckboards. Luckily I was watching my steps and both the viper and me escaped unharmed. Torronsuo isn’t normally this threatening. However, Torronsuo is the deepest bog in Finland as its peat layer is measured to be over 13 meters deep. There is something slightly intimidating about it when you are walking in the bog.

Directions to Torronsuo National Park

Torronsuo National Park
Somerontie 732

Accessibility: The Kiljamo bird watching tower area with a fireplace is accessible with a wide path, and you can go to the bog in a wheelchair or have a buggy for children right behind the information board. Otherwise the trails are not accessible for all as there are duckboards.

When to go: You can visit the area at any time of the year.

A quick update from 2019: The duckboards had been renewed on that short 1,5 km walk for the most part. The wheel chair accessible part right behind the information board was still in a bad shape. The longer duckboards through the bog are still waiting for maintenance.


The view from the Kiljamo bird watching tower is spectacular, don’t you think?

Torronsuo National Park

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Also visit in the area

Tammela municipality has plenty of amazing nature sites to check out. Saari Folk Park, Häme Visitor Centre, Korteniemi Heritage Farm, Liesjärvi National Park and Pääjärvi recreation area are all located in Tammela.

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