Burgwartsberg, Medieval castle ruins and mountain in Pesterwitz district, Freital, Germany.

Burgwartsberg is a mountain with castle ruins located near Freital, accessible by hiking trails that lead to its summit. The site combines natural slopes with remnants of fortifications scattered across the peak.

The spur was fortified in the second half of the 10th century as the centre of the Burgward Bvistrici, first documented in 1068 in a charter of King Henry IV. In the 1190s the burgraves of Dohna probably built Thorun Castle here, which was razed in 1206 after a court ruling. Historian Manfred Kobuch questioned the Burgward identification in 1997, and no archaeological digs have taken place.

The name Burgwartsberg dates from the 19th century, when the hill was assumed to be the centre of the Burgward Bvistrici recorded in a 1068 charter of King Henry IV. The name Bvistrici is Slavic and probably refers to the Weißeritz river. The new name was soon taken locally as proof of the assumption, and neighbouring streets were named after it.

Several marked hiking trails lead to and around the summit, offering different route options for visitors. The paths are walkable year-round, though conditions vary with the seasons.

No archaeological excavations have ever taken place on the Burgwartsberg, and no remains of possible stone buildings are known. The visible traces are earthen ramparts and a neck ditch, not masonry. During the Second World War an air-raid shelter tunnel existed inside the hill.