Commuter train from Stockholm to Nynäshamn, then transfer to SL bus 848 or 852. Get off at the Järflottavägen bus stop, which is approx. 1 km north of the reserve.
Nynäsvägen, Road 73, take the exit signposted Torö-Herrhamra. Continue 2.7 km to an exit marked Nynäshamn N, and take the road to Herrhamra-Stora Vika. Follow the sign for Käringboda nature reserve after 1.6 km.