The daily bus service (matkahuolto.fi) from Tampere to Huittinen stops at the Keikyä intersection, which is 10 km away from the Isosuo and Kärjenkallio parking areas.

There are bus services (matkahuolto.fi) from Helsinki, Turku and Pori to Huittinen, which is 14 km from the Isosuo parking area.

On school days, there is a bus service (matkahuolto.fi) from Sastamala to Huittinen. The closest bus stops to the national park on this bus route are in Villilä (6 km to the Isosuo and Kärjenkallio parking areas) and Karhiniemi (6 km to the Isosuo parking area).

The closest train (vr.fi) stations to the Puurijärvi-Isosuo National Park are at Vammala in Sastamala (23 km) and Kokemäki (24 km).