No humans allowed: The story behind this sprawling California open space

No humans allowed: The story behind this sprawling California open space

In the northwest corner of Los Angeles’ densely populated San Fernando Valley sits a massive open space area that would be an ideal destination for a weekend hike, bike ride, or picnic. The only problem? It’s protected by barbed wire and totally off-limits to the public, except for one day each year. The Chatsworth Nature Preserve, surprisingly the city’s only preserve, spans over 1,300 acres between Topanga Canyon and Valley Circle boulevards n…