The building techniques and the disposition of stones in layers let suppose that this little fortress was built around 1180. It is highly likely that the lords of the castle were the Counts of Tyrol. The last written documentation about Helfenberg goes back to 1353.
You can reach the castle ruin Helfenberg, starting from Restaurant Noafer in Glaning on the path nr. 6A and then on path nr. 9.