If you are traveling to Hartheim with the Linz local train (S5), please get off at the "Alkoven Schule" stop, from where you can walk to the castle in about 10 minutes.
It is possible to get to Hartheim Castle by car from the center of Alkoven. If you arrive by bus, we recommend coming either via Weidach (coming from Eferding in the direction of Alkoven before Alkoven) or via Axberg (coming from the direction of Marchtrenk).
