From Hanover and Kassel: A7 to junction Seesen; here B243 direction Osterode; after approx. 5 km turn onto B242 to Clausthal-Zellerfeld.
From Berlin: A2 to Wolfsburg-Königslutter junction; A39 to BS-Süd junction, continue in the direction of Bad Harzburg; A395 to Bad Harzburger Dreieck junction; continue on B6 in the direction of Goslar; from Goslar take the B241 to Clausthal-Zellerfeld.
From Leipzig: A38 to Nordhausen; continue on B243 towards Osterode; from Osterode B241 to Clausthal-Zellerfeld.
By bus and train
From Hanover and Berlin: Take the train to Goslar; from Goslar station take bus line 830 to Clausthal-Zellerfeld (bus stop: "Kronenplatz").
From Kassel: By train to Northeim or Herzberg. Take the bus from there.