Getting to Riddersholm

Archipelago ferry

Scheduled Waxholmsbolaget ferries to Kapellskär from Stockholm.
Waxholmsbolaget

Bus

SL bus 676 from Stockholm (departs from Tekn. Högskolan), then transfer to bus 631 in Norrtälje.
Stockholms Lokaltrafik

Car

Take the E18 for approx. 20 km east of Norrtälje.