Via Plane:

Flight to Athens Eleftherios-Venizelos International Airport.

There you can rent a car. The navigation details are:

Latitude: 37.547251 | Longitude : 22.921876

Over Italy by car:

Ferry Ancona-Patras or Venice-Patras

In Patras: Use the highway E65 to Korinthos . In Korinthos change to direction Tripoli.

In Nemea, take the exit and go to Nafplio. From Nafplio you go to Drepano and further to Vivari. At the village entrance you go left in between the first houses to Marathia. If you follow the street to Marathia and reach the village you just follow 3 times the sign to the right to Raches.