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Great Castle Hill trail 4

—•Hiking Trails

0 km

Description

Luontoon.fi – Iso Linnamäki polku 4 (Porvoo)+

Description

Great Castle Hill trail 4 (Iso Linnamäki polku 4) is an extremely short hiking strand on Iso Linnamäki, the large medieval hillfort beside Old Porvoo and the Porvoo River in Porvoo, Uusimaa. It works as a tiny forest-floor link between the other numbered micro-paths on the fortress crown; the trail-specific listing is on Luontoon.fi. The City of Porvoo summarises Pikku Linnamäki’s Iron Age burial ground and Iso Linnamäki as Finland’s largest ancient hillfort, in use from about 700 CE through the 1300s, with protection under the Archaeological Act. Visit Porvoo pitches Iso Linnanmäki as a quick workout or quiet wander from the old town: concentric paths, footbridges over dry moats, and wooden steps toward viewpoints. Visit Finland notes the twisted landmark pine, bridges over old moats, and Maari Park for picnics at the foot of the hills. Upe Nykänen’s Retkipaikka walk through Porvoo National Urban Park describes crossing Maari’s wetlands, a small arch bridge, stairs, and moat crossings—helpful atmosphere for how these short treads feel. Because this line sits only about 40 metres along from Linnanmäen heittokenttä, the municipal throwing field off Linnanmäentie makes a practical map landmark. Tie it together with Iso Linnamäki polku 1, Iso Linnamäki polku 2, Iso Linnamäki polku 3, Iso Linnamäki polku 5, Iso Linnamäki ylävallin polku on the upper earthwork, and Iso Linnamäki alavallin polku on the lower rampart ring for a longer circuit.

Length & route

The strand is only a few dozen metres as mapped—shorter than the roughly 0.1 km loops used for Iso Linnamäki polku 2, Iso Linnamäki polku 3, and Iso Linnamäki polku 5—acting as a junction link on the fortress crown. Surfaces match the wider hill network: pine-forest foot tread, short wooden bridges at dry moats, and occasional steps. String it with the other Iso Linnamäki segments for a full hillfort wander.

Getting there

The geometry lies on Iso Linnamäki north of Old Porvoo (centred near 60.400°N, 25.651°E). Visit Porvoo suggests about a five-minute walk from the old town to the foot of the hill, then following the ring paths upward. Many people approach from Maari along wetland paths similar to the Retkipaikka narrative. Linnanmäen heittokenttä at Linnanmäentie 2 is close enough to use as a waypoint when matching the map to the ground. Wear sturdy shoes; slopes and bridges can be slippery after rain. The City of Porvoo’s national urban park pages include a map link for the Linnamäki hills.

Good to know

The castle hills are protected ancient monuments—keep to paths, do not disturb stones or earthworks. There is no dedicated campfire infrastructure on the archaeological crown; picnics fit better in Maari Park below.

History

The City of Porvoo notes Pikku Linnamäki’s Iron Age burial area (about 100 BCE–300 CE) when the site was still a low island in a narrow bay, while Iso Linnamäki is described as Finland’s largest ancient hillfort, in use from about 700 CE through the 1300s, with hills protected under the Archaeological Act. Timber castle superstructures have not survived on site.

Managed by

Porvoo

Official Maintenance

+358 40 489 9801

GPX data from: © Metsähallitus, 2024

Trail info

Either direction on this short connector; continue onto Iso Linnamäki polku 1, Iso Linnamäki polku 2, Iso Linnamäki polku 3, Iso Linnamäki polku 5, Iso Linnamäki ylävallin polku, or Iso Linnamäki alavallin polku depending on where you want to explore next.

Route direction

Open / Good Condition

Activities allowed

Run

Activity

Hike / Walk

Activity

Terrain & conditions

0 km

Distance

A couple of minutes on this strand alone; allow longer when you link neighbouring Iso Linnamäki paths or walk up from Maari and the river.

Est. Time

Dirt

Surface

Loop

Route Type

Moderate Traffic

Traffic

Partial Shade

Shade

Location

60.39980°N, 25.65129°E

Approximate location

FinlandCountry

UusimaaRegion

PorvooCity

Hiking TrailsCategory

Explore nearby

Linnanmäen heittokenttä

237 m

Free

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Answers to your questions

Our data was researched from Porvoo, 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.

Finland Uusimaa Porvoo Hiking TrailsGreat Castle Hill trail 4