For a number of years, young people around Munich have used the course as a dirt park and spent their leisure time there on their bikes. The course was maintained and continually expanded. Now it's over. The Munich District Office and the City of Munich will be removing the course from 16 March.
Here is the official announcement from the Munich District Office:
Joint press release by the Munich District Office, the City of Munich, the Isar Valley Association, the municipality of Grünwald and the Ebersberg Office for Agriculture and Forestry:
The so-called "bomb crater" owned by the City of Munich and the Isar Valley Association in the municipality of Grünwald on the east bank of the Isar north of the Isar bridge has been used for several years as an illegal BMX course on an area of currently approx. 3,500 m² and is constantly being expanded. Soil compaction and damage to tree roots and trunks are the result. Damaged trees have to be removed and replaced by reforestation. In addition, users of the site are putting themselves and other recreational users at risk. Removal is therefore necessary for reasons of road safety.
The site is located in the "Isartal" landscape conservation area and the "Oberes Isartal" FFH area and is also protected as a protected forest and soil conservation forest. The aim now is to prevent the ongoing damage to the valuable ravine and mixed slope forest, which is protected as an FFH habitat type and as a landscape conservation area, and to protect recreational users from disturbance and hazards.
In co-operation between the City of Munich (municipal department and building department), the Isartalverein, the Munich District Office, the Ebersberg Office for Agriculture and Forestry and the municipality of Grünwald, efforts are now being made to remove the illegal BMX course.
With the order issued by the Munich District Office, the state capital of Munich is obliged to remove the plant and renaturalise the area. This is intended to fulfil the protection status of the area and ensure that a mixed forest of ravines and slopes can develop. The City of Munich (Building Department) is expected to carry out the work to restore the forest floor to its original state between 16 March and 5 April.
To protect the reforestation, the area will be protected from game browsing and trespassing by unauthorised persons with a forest protection fence. Visitors to the forest will be informed by signs that it is not permitted to enter the renaturalisation areas.