The "Claus" oak is a testimony to the earlier use of the forest for grazing, which was practised until the beginning of the 19th century. Single standing oaks with their expansive treetops provided shelter from rain and heat for the cattle grazing in the forest. They also contributed to the fattening of the pigs with their acorns. In former times, however, there was also a forest-field economy. Cereals were cultivated. Both uses were very intensive and led to more than 30 percent of the forest areas in this area becoming desolate during this time. In the middle of the 19th century, the wasteland was reforested with oaks. The forester "Claus" at the time rendered outstanding services to this reforestation.
The exact age of the "Claus" oak can only be estimated. It is about 350 years old and the circumference of the trunk near the ground is almost 5.50 metres, the diameter about 1.60 metres. The amount of wood is estimated at about 25 cubic metres.
1. West of Osann via the "Trierer Straße": turn right directly after the overpass over the L53 and then park your car on the side of the farm tracks there;
2. coming from Klausen on the L47, turn left shortly before the junction with the L47 in the direction of Bernkastel-Kues or the L53 in the direction of Witlich. Turn left again directly before the overpass over the L53 and then park on the side of the farm track there.