Home / Events / Chatsworth Nature Preserve Earth Day Open House Earth Day Open House Saturday, June 24, 2023 - 4:00 PM to 8:00 PM This event has passed. Check out the Event Calendar for upcoming events. Celebrate Earth Day at the only Nature Preserve in the City of Los Angeles. Event Location: Chatsworth Nature Preserve 23236 Valley Circle Blvd. Chatsworth, CA 91311 Get Directions