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Torronsuo National Park

Plizio editorial teamUpdated: Jun 2026Data Sources

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Torronsuo National Park, located in the Proper Tavastia region of southern Finland, was established in 1990 to protect the deepest raised bog in the country. The peat layers here reach a thickness of up to 12 meters, making the area a valuable archive for post-glacial vegetation history. Spanning approximately 25 square kilometers, the open, treeless mire landscape is renowned for its rich birdlife and rare insect species. Geographically, the bog is a classic ombrotrophic dome, fed solely by rainwater, resulting in an extremely nutrient-poor environment. In the past, quartz was mined here for the glass industry, but today nature conservation is the primary focus. The park serves as a vital resting place for cranes and whooper swans during their spring and autumn migrations. Visitors can traverse the mire on kilometers of wooden boardwalks, which also provide access to the Kiliamo observation tower. The ecosystem is particularly sensitive to climate change, which is why it is used extensively for long-term ecological research.

Location: Finland
Top sights: Torronsuon kansallispuisto · Louhos · Viewpoimt
Nearby: Jokioinen (11 km)

Best time to visit & climate

The most pleasant time to visit is Jun–Aug.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	-6	-6	-3	4	10	14	18	16	11	5	1	-3
Rain mm	58	46	43	44	52	73	70	72	60	77	71	69

📋 Practical info

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Getting there

This deep mire area is relatively easily accessible by car via well-maintained local roads. The actual entrances to the national park are generally clearly and understandably signposted.

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Best season

Spring is simply handy for bird watching, while the autumn season makes the mosses shine in exceptionally bright colors. In deep winter, you can often enjoy excellent cross-country skiing.

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Terrain & paths

Since it is officially the deepest mire in Finland, the terrain is extremely swampy. Exploration therefore typically takes place almost exclusively via well-developed, safe wooden duckboards.

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What to bring

As long as you sensibly stay on the duckboards, standard hiking shoes are completely sufficient. However, binoculars are highly advisable for nature lovers to study the rich local birdlife.

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Parking

At the edge of the expansive mire, there are typically small, designated parking lots for visitors. However, these can quickly become overcrowded on busy weekends during the bird migration.

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Safety

It is absolutely crucial never to leave the marked boardwalks, as the extremely soft peat soil is unpredictably deep. The wooden paths can also be quite slippery in wet or frosty weather.

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Time needed

An average walk on the boardwalks across the vast, open mire landscape usually takes two to three hours, gracefully leaving enough time for deeply relaxed observation breaks at the viewing tower.

Geography

Coordinates

60.73330, 23.63330

Facts

Year established: 1990
Total area: 25.5 square kilometers
Maximum peat depth: 12 meters
Birdwatching: Vital crane resting area
Observation tower: Kiliamo (with ramp)
Geology: Largest raised bog in Southern Finland

Explore nearby

Notable places around

Torronsuo4 km · SWExplore →

Forssa9 km · NExplore →

Jokioinen11 km · NWExplore →

Somero12 km · SExplore →

Humppila27 km · NWExplore →

Loimaa33 km · NWExplore →

Karkkila38 km · SEExplore →

Urjala39 km · NExplore →

Route planner — Car & Motorhome

Where do you start? We build the route here, with stops and country notes along the way.

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Overnight stops

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Only stops with (optional): 💧 Water ♻️ Disposal 🔌 Power 🚻 Toilets 🚿 Shower

Sights in the town Torronsuo National Park (4)

Torronsuon kansallispuisto

National park in Tammela, Tavastia Proper, Finland, featuring a bog landscape.

Louhos

Quarry in Torronsuo National Park, a geological point of interest.

Viewpoimt

Viewpoint in Torronsuo National Park, overlooking the bog.

Kiljamon torni

Observation tower in Torronsuo National Park, offering panoramic views.

Sights nearby

Frequently asked questions

How deep is the bog in Torronsuo?

It is Finland's deepest raised bog, with peat layers reaching up to 12 meters.

Are there hiking trails there?

Yes, there are well-maintained duckboard trails that lead safely through the mire.

Is the park accessible in winter?

In winter, it is a popular area for cross-country skiing on marked trails.

Is berry picking allowed?

Yes, picking cranberries and cloudberries is allowed under everyman's rights.

Where can I park?

The main parking area is located in Kiljamo, where an observation tower is also available.

Torronsuo National Park: where is it located?

Torronsuo National Park is located in Finland.

Torronsuo National Park: what is there to see?

Highlights include Torronsuon kansallispuisto, Louhos, Viewpoimt.

Torronsuo National Park: when is the best time to visit?

The most pleasant time to visit is Jun, Aug.

Torronsuo National Park: why is it worth visiting?

Torronsuo National Park, located in the Proper Tavastia region of southern Finland, was established in 1990 to protect the deepest raised bog in the country.

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