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Kraatterijärvi is a unique geological wonder in Southern Ostrobothnia, specifically in the Alajärvi region. It is Finland’s only scientifically recognized meteorite crater, formed approximately 73 million years ago as a result of a massive meteorite impact. This circular lake has a diameter of nearly 22 kilometers, making it the sixth largest meteorite crater in Europe. Kraatterijärvi now forms a significant tourist destination, around which the Kraatterijärvi Geopark area has developed with numerous attractions and activities.
What is Kraatterijärvi?
Kraatterijärvi is a circular lake formed as a result of a meteorite impact, located in Southern Ostrobothnia in the Alajärvi city area. It is a geologically significant site, as it is Finland’s only scientifically proven meteorite crater and simultaneously one of the world’s best-preserved ancient impact craters.
The lake’s diameter is approximately 22 kilometers, and around it are located several smaller lakes and villages, which together form the so-called Lake District. The area is known for its beautiful landscapes, pristine nature, and rich cultural heritage.
Kraatterijärvi is extremely significant to the region’s identity, and it has inspired local culture, art, and industries. Around the lake, the Kraatterijärvi Geopark has developed, which promotes geological tourism in the area and increases awareness of this unique natural formation.
How was Kraatterijärvi formed?
Kraatterijärvi was formed approximately 73 million years ago when a massive meteorite struck the area of present-day Southern Ostrobothnia. The impact force was so great that it significantly reshaped the terrain and created a wide crater, which later filled with water forming the present lake.
At the moment of impact, the meteorite caused an explosion whose intensity was many times greater compared to a nuclear bomb. As a result of the strike, the bedrock was crushed and partially melted, forming special rock types that occur only in meteorite craters. These are called impactites, and they can be found in the environment surrounding the crater area.
The formation of Kraatterijärvi has been a multi-stage process. Originally, the impact created a deep pit, which over time filled with water. Ice ages and other geological processes have shaped the crater, but its circular form has remained recognizable for millions of years, which makes it geologically particularly significant.
What is there to see in the Kraatterijärvi area?
The Kraatterijärvi area has plenty to see and experience. Kraatterijärvi Geopark offers diverse nature and cultural experiences suitable for visitors of all ages. The area has several geological sites, viewpoints, and nature trails where you can learn about the crater’s history and unique nature.
The area’s main attractions include:
- Vimpeli’s Lakeaharju, from which opens a magnificent view of the crater lake landscapes
- Alajärvi cultural center, where you can learn about the area’s geological history
- Alvar Aalto sites, such as Alajärvi library and city hall
- Nykälänniemi nature trail, which presents the area’s nature and geology
- Nelimarkka Museum, where you can admire art in an inspiring environment
Among activities, the most popular are fishing, canoeing, cycling, and hiking. Around Kraatterijärvi runs a cycling route that offers the opportunity to explore the area’s landscapes and villages. In winter, you can ski, ice fish, and enjoy the winter nature in the area.
When is the best time to visit Kraatterijärvi?
You can visit Kraatterijärvi year-round, but the summer season from June to August offers the best conditions for comprehensive exploration of the area. In summer, you can enjoy bright nights, warm weather, and all the area’s activities. During summer months, you can swim, canoe, and fish in the lake, and many of the area’s events are organized precisely during summertime.
In autumn, the landscape colored by fall foliage is especially beautiful, and September-October is an excellent time for nature hiking and photography. In winter, the Kraatterijärvi area offers opportunities for winter activities such as skiing and ice fishing when the lake surface freezes.
Spring brings awakening nature and bird migration, which makes April-May an interesting time for nature observers. The area’s most significant events are often scheduled for summertime, when markets, concerts, and village festivals are organized, among other things.
How do you get to Kraatterijärvi?
The Kraatterijärvi area is located in Southern Ostrobothnia, and there are good transport connections by car from different parts of Finland. Alajärvi is the central city of the crater area, and it is located approximately 360 km from Helsinki, 70 km from Seinäjoki, and 150 km from Vaasa. The nearest railway station is in Seinäjoki, from where there are regular bus connections to Alajärvi.
Local transport services are limited in the area, so your own car or a rental car is the most convenient way to move between different attractions. The area also has good cycling routes, and in summer, traveling by bicycle is a pleasant way to explore the crater lake landscapes.
Where to stay and eat during your visit to Kraatterijärvi?
The Kraatterijärvi area offers various accommodation options for every taste and budget. In Alajärvi center, we at Hotel-Restaurant Alvariini offer comfortable and well-equipped rooms that are excellent as a base for exploring Kraatterijärvi. Our location is ideal, as many of the area’s attractions are easily accessible.
For motorhome travelers, we offer a free caravan area where you can stay comfortably and use the hotel’s services such as sauna, laundry service, and gym. This makes staying especially comfortable and easy.
