The origin of the Green Belt of Vitoria-Gasteiz dates back to the Municipal Urban Development Plan of 1986, in which the local government proposed to complete the General System of Open Spaces by adding almost 300 hectares of nature reserves consisting of wooded parks bordering the city with the aim of creating a Green Belt around the city that would provide a comprehensive solution to the general state of degradation of the periphery of Vitoria-Gasteiz. To address this problem and recover the peri-urban spaces, it was decided to undertake a large-scale project that would encompass the entire periphery of the city and provide a solution to both the most degraded and the most natural areas. A continuous network of green spaces was created around the city (30.8 km), which responded to the following objectives:: - To provide a comprehensive solution to urban-industrial edge areas. - To promote the conservation of the natural values and existing biodiversity of peri-urban areas. - To respond to the public demand for open-air leisure areas, reducing the pressure on other natural spaces. - To take advantage of the potential of nearby natural areas as an educational and interpretative resource. - To involve citizens in the care and conservation of the natural heritage of Vitoria-Gasteiz, promoting the identity of this space.