Description
Terassikierros is an 8.9 km loop hiking trail in Lauhanvuori National Park, in Isojoki, South Ostrobothnia. The trail takes about 3 hours and is rated moderate in difficulty. For up-to-date information, see the trail page on Luontoon.fi. It is one of the key featured routes in the Lauhanvuori-Hämeenkangas UNESCO Global Geopark.
The name comes from the geological character of the trail: the route winds through ancient beach terraces and dunes formed after the last ice age, when this hilltop — now the highest point on Finland's west coast at 231 m — was an island in the post-glacial Baltic Sea. As land rose out of the water over millennia, the retreating waves left behind gently stepped terraces still visible in the forested slopes today. The trail is marked with blue dots and followed in a counter-clockwise direction; signage appears at intersections, but the well-worn path is clear throughout.
The official starting point is the Lauhanvuori summit parking area. From there signs lead to the observation tower, where information boards inside the ground floor explain the park's geology and history. The trail then heads north to the Lauhan kämppä hut complex about 600 m beyond the tower. Here you will find Lauhan tupa (a wilderness hut), Lauhan tuvan kesähuone (a summer room), Lauhan kämppä puolikodat (open lean-to shelters), and Lauhan kämpän sauna. Dry toilets are available near the huts, and Lauhan kämpän parkkipaikka sits close by. From the hut area the route turns west, skirting the southern fringe of Kärkikeidas — a quiet open bog — for about 1.3 km before heading south toward Spitaalijärvi.
Around 4.9 km into the loop, the trail reaches Spitaalijärvi, a clear-water lake with an unusual history: its water was once believed to cure skin diseases — the name derives from the Finnish word for leprosy — and the story goes that it was shipped to the Russian aristocracy. Two rest areas sit at the lake. On the western shore, Spitaalijärvi keittokatos is a day-use cooking shelter next to a swimming beach, with Nuotiorinki spitaalijärvi (a campfire ring) nearby. About 500 m to the east is a second area where you can set up a tent at Spitaalijärvi and use the fire pit at Lauhanvuoren tulentekopaikka, Spitaalijärvi telttapaikka; a natural spring here provides drinking water. Both areas are also reachable directly from Lauhanvuoren pysäköintialue, Spitaalijärvi, a free parking area just off the road.
The route continues west and then north, completing the loop near the 8.5 km mark at Kaivolammi — a small forest pond with a campfire spot (Lauhanvuoren tulentekopaikka, Kaivolammi) and a dock. It makes a peaceful final rest stop before the short return to the trailhead.
Along the early section near the summit, look out for the Finnish forest reindeer (metsäpeura) enclosure. This native species, once extinct in southern Finland, was reintroduced to Lauhanvuori through the EU-funded MetsäpeuraLIFE project between 2016 and 2023, with 42 animals released into the park. Metsähallitus carried out a supplementary restocking in spring 2025 to strengthen the population and broaden its genetic diversity.
Retkipaikka's Luontopolkumies walked the route in late May and describes it as a "wonderfully bright and open pine forest" with a soft, comfortable path — the 9 km passing by easily in just over three hours. Finland Naturally writer Paul Stevens hiked from Spitaalijärvi campsite in early May and noted how the vegetation visibly shifts near the summit, where the hill's unusually fertile glacial soil supports a richer mixed forest of pine, spruce, birch, and juniper.
From the summit, Rantapolku (2.3 km) shares the same path for the upper section and offers a shorter loop option. The longer Luontoreitit Lauhanvuori-Lauhansarvi (26.1 km) can be joined here for a multi-day traverse of the area.
Getting there
From the east, take Road 44 (Kankaanpää–Kauhajoki direction). In the village of Muurahainen, follow signs for Lauhanvuori National Park for about 5 km to reach the summit. At the summit, the parking area (Lauhanvuori laki, pysäköintialue, näkötorni) is on the right side of the road with signs to the trails.
From the west, take Road 664 (Lappfjärd–Honkajoki). About 1.5 km southeast of Isojoki church, turn at the junction signed for Lauhanvuori National Park and continue about 13 km to the summit parking area on the left.
Alternative starting point: Lauhanvuoren pysäköintialue, Spitaalijärvi is about 2 km from the summit along Lauhanvuorentie. Turn at the signpost to Spitaalijärvi and drive about 700 m. No public transport serves the national park.