Archipelago Trail: route guide

The trail is a ring, not a line, so you finish where you started. From Turku the clockwise direction runs through Kaarina and Pargas, out to Nagu, Korpo, Houtskär and Iniö, then north to Kustavi and Taivassalo, and back to Turku through Velkua or Askainen, Merimasku and Naantali. The Rymättylä shortcut leaves the ring at Nagu and rejoins near Naantali, skipping the outer western islands.

Bridges link the inner islands; short ferries cover the gaps that roads cannot. Two of those ferry links exist mainly for tourists and are the reason the loop is a summer route. The archipelago around the trail is a UNESCO biosphere reserve, and Archipelago National Park sits in the outer islands south of the route — reachable by side ferries from Nagu and Korpo, not on the ring itself.

Coordinates for the route area are approximately 60.3600, 21.8500 (Archipelago Sea, approximate).

Pargas is the first real island town and the gateway to the outer archipelago. It has the limestone quarry and industrial history that shaped the region, plus the first good stretch of island road. Nagu is the busiest village on the route and the usual first overnight: guesthouses, a marina, food and the ferry south toward the national park.

Korpo and Houtskär are quieter, with village churches from the Middle Ages and long stretches of forest road between small settlements. The Houtskär–Iniö ferry is the seasonal hinge of the loop; without it you either take the shortcut or retrace your steps. Iniö, Kustavi and Taivassalo form the northern arc, flatter and more agricultural, before the route returns through Naantali — worth a stop for its old town and the Moomin World theme park if you are travelling with children.

The Rymättylä shortcut is the practical choice for a short trip or a shoulder-season ride. It leaves the ring at Nagu and runs via Rymättylä to Naantali, skipping Korpo, Houtskär and the northern arc, so you still get Nagu and the ferry experience but not the outer western islands.

Many Finns take their summer holiday between Midsummer and mid-August, when schools start, and that is when the route works best: both seasonal ferry links run, cottages and cafés are open, and the weather is mild. The 2025 season for the Houtskär–Iniö car ferry and the Rymättylä shortcut link ran 9 May to 14 September; treat those dates as a guide and check the current year before booking.

Spring and autumn are quieter and cheaper, but some services close and the seasonal ferries may not run, so the full ring can be impossible — especially by car. Winter travel is possible on the year-round connections but is a different trip: pick one island and stay, rather than trying to complete the loop.

The standard pattern is one night per island cluster: Nagu, Korpo or Houtskär, then Kustavi or Taivassalo on the northern side. Nagu has the widest choice of guesthouses, hotels and restaurants. The outer islands lean on cottages, B&Bs and farm stays, which book out early in July.

A shore cottage is the reason many people come. Most cottages sit by the water, often with a rowing boat, and a day of doing nothing on the rocks is a fair use of the trip. Book ferries and accommodation together in high season; the seasonal links have limited vehicle space.

Bike or car is the easiest way to travel the route; coaches let you do it without a vehicle, but they follow the main roads and skip some of the quietest stretches. There is also a walking variant over part of the distance, partly through woods, developed as a pilgrimage route toward Trondheim — a very different pace and experience.

Pack for changeable weather: rain shell, layers, and insect repellent for the forest sections. Carry water and snacks between villages, since services thin out on the outer islands. On the main islands, picking wild berries and camping wild are normal under Finland's right to access; be careful with fire, and do not land on islets with nesting waterfowl. The road mostly runs through island interiors, so if you want shore time, plan a cottage day or a side ferry rather than expecting it from the driving.