The Conejo Open Space Conservation Agency (COSCA) was created in 1977 as a joint powers agency between the City of Thousand Oaks and the Conejo Recreation & Park District for the purpose of protecting and managing open space. The agency has been instrumental in the creation of this open space system.
The community's open space is a tribute to the commitment of residents and officials to an excellent environment and a natural legacy of increasing value. Open Space contains about 75 miles of multipurpose hiking, biking and equestrian trails that provide recreational opportunities for all ages. In 1996, the American Hiking Society and National Park Service recognized this trail system by presenting the City of Thousand Oaks with the Trail Town USA Hall of Fame Award. The City is also a recognized "Tree City USA."