Description
Lammassaari accessible boardwalk is about 1.5 km of point-to-point walking on a wide, barrier-free wooden and firm-surface path from beside the Vanhankaupunginkoski footbridge on Pornaistenniemi through the reedbeds of Viikki–Vanhankaupunginlahti to Lammassaari in Helsinki. For closures, reserve rules, slope figures, and the latest accessibility statement, the City of Helsinki’s Lammassaari accessible boardwalk page is the right place to start. The Pornaistenniemi and Lammassaari outdoor pages tie the boardwalk to picnics, the Museum of Technology on Kuninkaankartanonsaari, seasonal grazing, and rules such as no cycling on the boardwalk, no fishing in the nature reserve, and keeping dogs on a leash. Finnish Architecture’s project note describes how Studio Puisto and Nomaji rebuilt the route in 2016–2018 with modular decking, glazed ends on the new viewing platforms, and curves tuned for wheelchair sightlines.
The trail is in Uusimaa and easy to pair with a short visit to Helsinki’s city nature. Near the start you pass Vanhankaupunginlahden suvantoalue Kalastuspaikka and Tekniikan museo on the island; dry toilets are available close to Vanhankaupunginlahti parkkipaikka. After a few hundred metres you reach Viikki-Vanhankaupunginlahti, Pornaistenniemen lintutorni and Viikki-Vanhankaupunginlahti, Pornaistenniemen piilokoju — classic tower-and-hide birding spots where the towers themselves are not fully accessible, while the boardwalk’s own structures compensate further out. About half a kilometre in you come to Lammassaaren lankkupolku, pohjoinen katselutasanne and a little later Lammassaaren lankkupolku, eteläinen katselutasanne: raised decks with glass fronts and interpretation about marsh birds. Toward the island end are Viikki-Vanhankaupunginlahti, Lammassaaren esteetön lintulava, Viikki-Vanhankaupunginlahti, Lammassaaren lintutorni, and Viikki-Vanhankaupunginlahti, Lammassaaren esteetön piilokoju — together they give sheltered, ground-level and slightly raised views across open water and reed edges without leaving the accessible framework.
From Pornaistenniemi you can warm up on Luonnon syli nature trail, 1 km (accessible), a separate ring through the alder grove before committing to the longer crossing. In winter the Hermanni–Viikki ski trail and Hermanni–Viikki ulkoilureitti 3,3 km share the broader foreshore network nearby. Urbaanipatikoijat’s walk journal captures how the boardwalk threads alder forest, then the reed sea, and how side paths connect toward Kuusiluoto for visitors comfortable with narrower timber. Piritta Kallio’s Retkipaikka piece flags that the accessible boardwalk is not winter-maintained while still being a favourite year-round escape; she notes clear signing toward the hide and practical arrival options by bus or car.