For Metsähallitus trail facts and any access updates, start from the 120mm Kierros page on Luontoon.fi. Visit Kemiönsaari summarizes how the fortress island of Örö fits into Archipelago National Park and how people reach it from Kasnäs. On the ground, Retkipaikka’s illustrated account by Jonna Saari is especially...
Luontoon.fi – 120mm Kierros, Kemiönsaari+
Description
For Metsähallitus trail facts and any access updates, start from the 120mm Kierros page on Luontoon.fi. Visit Kemiönsaari summarizes how the fortress island of Örö fits into Archipelago National Park and how people reach it from Kasnäs. On the ground, Retkipaikka’s illustrated account by Jonna Saari is especially useful for pacing, terrain, and the military-history ambience along the north shore.
The 120 mm circuit is about 5.3 km as a loop on Örö in Kemiönsaari, Southwest Finland. The name comes from 120 mm coastal artillery once associated with the route’s gun positions—a reminder that the island served for roughly a century as a closed fortress before opening for public nature visits under national park management. The circuit is marked in red and is usually walked counter-clockwise from the trailhead area near the island’s main services. It explores the north side of the island: sheep-grazed heritage meadows and coastal woods, rocky viewpoints toward open sea, and the road junction where the island’s well-known cross-island thoroughfares Lyhyt Ikävä and Pitkä Ikävä branch. Expect fine old pines, low coastline, and exposed gun foundations and bunker zones toward the north tip, where marked side paths invite careful exploration.
Along the first part of the loop you pass near Örön frisbeegolf and Balget veneenlaskupaikka, then the island tent camping clusters Örö Telttailualue 2, Ruokailukatos Telttailualue, and Örö telttailualue 1 with their supporting wells at Örön porakaivo vesilaitoksella and Örön porakaivo hotellin takana. Closer to the harbour fronts lie ÖRÖ Rantasauna, ÖRÖ Hårdasnäsin sauna, Örön sataman rantalaituri, and the guest piers Örön vierasvenelaituri 1, Örön vierasvenelaituri 2, and Örön vierasvenelaituri 3—handy if you arrive by boat or want a sauna swim after hiking. The return leg reaches the dry toilet at Örön käymälä pohjoiskärki in the north. Off-route facilities belong to the wider island; follow local grazing and cycling rules where paths cross pastures.
The same trailhead neighbourhood links to Kuuden Tuuman Kierros, the blue-marked south circuit, and to a short connector toward the harbour area; longer Rannikkoreitti cycling geometry and the sea kayak line Kansallispuistokierros touch overlapping quays and beaches nearby for people combining activities.
Length & route
The trail is about 5.3 km as one loop. Visit ÖRÖ describes this as the red-marked nature circuit toward the north of the island, quoting about 5.6 km on their nature page—rounding differs, but the shape matches the north-shore ring. Surfaces shift between meadow tracks, forest paths, rock ledges, and short road links near historical yards; sturdy footwear suits wet meadows and rooty woodland. The blue Kuuden Tuuman Kierros is the contrasting south loop in the same trail family.
Getting there
Cars cannot drive onto Örö. Practical access is from Kasnäs: Visit Kemiönsaari lists the guest harbour address Kerhontie 1, 25930 Kasnäs and phone 050 543 2905 for service providers. Scheduled and charter boats connect Kasnäs to Örö in roughly 30–60 minutes depending on vessel and season; visitors also arrive with their own boats to the guest marina. After landing, walk from the harbour toward the trail kiosks near the accommodation cluster—Retkipaikka’s write-up places the 120 mm trailhead within about a kilometre of the harbour. Confirm timetables, fares, and winter options with operators before travel.
Good to know
There is no campfire provided on the 120 mm circuit itself; respect national park and grazing rules. If you explore bunkers, take a light and mind slippery steps. Ferry access is weather-dependent—check the latest operator advice.
History
Örö developed as a Russian-era fortress island to guard approaches toward the Gulf of Finland, then continued in Finnish coastal defence with extensive concrete batteries and garrison buildings. After long military closure, the island entered public nature use within Archipelago National Park, letting hikers explore the gun lines and meadows that recovered during the restricted era.
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Answers to your questions
Our data was researched from Kemiönsaari, and other trusted sources, in March 2026. Our route / place GPX data comes from Metsähallitus / Lipas, last updated March 2026. Always check their official website for safety-critical updates.
For Metsähallitus trail facts and any access updates, start from the 120mm Kierros page on Luontoon.fi. Visit Kemiönsaari summarizes how the fortress island of Örö fits into Archipelago National Park and how people reach it from Kasnäs. On the ground, Retkipaikka’s illustrated account by Jonna Saari is especially...
Luontoon.fi – 120mm Kierros, Kemiönsaari+
Description
For Metsähallitus trail facts and any access updates, start from the 120mm Kierros page on Luontoon.fi. Visit Kemiönsaari summarizes how the fortress island of Örö fits into Archipelago National Park and how people reach it from Kasnäs. On the ground, Retkipaikka’s illustrated account by Jonna Saari is especially useful for pacing, terrain, and the military-history ambience along the north shore.
The 120 mm circuit is about 5.3 km as a loop on Örö in Kemiönsaari, Southwest Finland. The name comes from 120 mm coastal artillery once associated with the route’s gun positions—a reminder that the island served for roughly a century as a closed fortress before opening for public nature visits under national park management. The circuit is marked in red and is usually walked counter-clockwise from the trailhead area near the island’s main services. It explores the north side of the island: sheep-grazed heritage meadows and coastal woods, rocky viewpoints toward open sea, and the road junction where the island’s well-known cross-island thoroughfares Lyhyt Ikävä and Pitkä Ikävä branch. Expect fine old pines, low coastline, and exposed gun foundations and bunker zones toward the north tip, where marked side paths invite careful exploration.
Along the first part of the loop you pass near Örön frisbeegolf and Balget veneenlaskupaikka, then the island tent camping clusters Örö Telttailualue 2, Ruokailukatos Telttailualue, and Örö telttailualue 1 with their supporting wells at Örön porakaivo vesilaitoksella and Örön porakaivo hotellin takana. Closer to the harbour fronts lie ÖRÖ Rantasauna, ÖRÖ Hårdasnäsin sauna, Örön sataman rantalaituri, and the guest piers Örön vierasvenelaituri 1, Örön vierasvenelaituri 2, and Örön vierasvenelaituri 3—handy if you arrive by boat or want a sauna swim after hiking. The return leg reaches the dry toilet at Örön käymälä pohjoiskärki in the north. Off-route facilities belong to the wider island; follow local grazing and cycling rules where paths cross pastures.
The same trailhead neighbourhood links to Kuuden Tuuman Kierros, the blue-marked south circuit, and to a short connector toward the harbour area; longer Rannikkoreitti cycling geometry and the sea kayak line Kansallispuistokierros touch overlapping quays and beaches nearby for people combining activities.
Length & route
The trail is about 5.3 km as one loop. Visit ÖRÖ describes this as the red-marked nature circuit toward the north of the island, quoting about 5.6 km on their nature page—rounding differs, but the shape matches the north-shore ring. Surfaces shift between meadow tracks, forest paths, rock ledges, and short road links near historical yards; sturdy footwear suits wet meadows and rooty woodland. The blue Kuuden Tuuman Kierros is the contrasting south loop in the same trail family.
Getting there
Cars cannot drive onto Örö. Practical access is from Kasnäs: Visit Kemiönsaari lists the guest harbour address Kerhontie 1, 25930 Kasnäs and phone 050 543 2905 for service providers. Scheduled and charter boats connect Kasnäs to Örö in roughly 30–60 minutes depending on vessel and season; visitors also arrive with their own boats to the guest marina. After landing, walk from the harbour toward the trail kiosks near the accommodation cluster—Retkipaikka’s write-up places the 120 mm trailhead within about a kilometre of the harbour. Confirm timetables, fares, and winter options with operators before travel.
Good to know
There is no campfire provided on the 120 mm circuit itself; respect national park and grazing rules. If you explore bunkers, take a light and mind slippery steps. Ferry access is weather-dependent—check the latest operator advice.
History
Örö developed as a Russian-era fortress island to guard approaches toward the Gulf of Finland, then continued in Finnish coastal defence with extensive concrete batteries and garrison buildings. After long military closure, the island entered public nature use within Archipelago National Park, letting hikers explore the gun lines and meadows that recovered during the restricted era.
Be the first to write a review for "120 mm circuit"
Share a photo from a recent trip
Answers to your questions
Our data was researched from Kemiönsaari, and other trusted sources, in March 2026. Our route / place GPX data comes from Metsähallitus / Lipas, last updated March 2026. Always check their official website for safety-critical updates.