Arroyo Conejo (Spanish for “Rabbit Creek”) is the longest creek in the Conejo Valley, sprawling over the cities of Newbury Park, Thousand Oaks, Camarillo, and the CDP’s Casa Conejo and Santa Rosa Valley. Arroyo Conejo is the primary drainage for the City of Thousand Oaks Its total area is 57 square miles; 43 sq. miles in the Conejo Valley and 14 additional sq. miles in the Santa Rosa Valley.