The Burgstall of Schlosshügel near Weidenberg is a lost hill castle or circular rampart site of the type known as a motte from the Early Middle Ages.

It lies on the southern perimeter of the Fichtel Mountains at a height of 699 metres above sea level (NN) above the village of Sophienthal, which is part of the market borough of Weidenberg in the Upper Franconia county of Bayreuth in Bavaria.

The burgstall or lost castle site was partly investigated by means of an archaeological test excavation and was also mapped several times in the past.

The local historian, Joachim Kröll, wrote about it thus: The remains are especially easy to make out; they show how originally a tower motte stood by itself on the hill and that other parts of a fortification were built by it and protected by ditches and ramparts.

The provision of these troops could have come from the hamlet of Neuhaus, to which a water ditch was laid from the area of the Kreuzstein which has survived into the present day.

Because of its location the castle could have been the administrative base mentioned in the records as Gurtstein mitsamt dem Walde and been used to support the royal forestry industry and medieval iron ore extraction, smelting and processing in the Steinach valley, which was later moved to Weidenberg.

[5] Other historic roads ran from north to south into the interior of the Fichtel Mountains and from east to west towards Eger (now Cheb).

The associate professor (Privatdozent) at the University of Bamberg, Hans Losert, published [7] photographs of pieces of pottery that had been found on the Schlosshügel.

The first sketch of the burgstall was made by Johann Christoph Stierlein in 1791 and is now held in the Bavarian State Library at Munich (Bayerischen Staatsbibliothek München).

A geodetic survey of the site was carried out in 1989 by Hermann Kerscher of the Bavarian State Office for Heritage Conservation (Bayerisches Landesamt für Denkmalpflege).