The Mt. Clef Ridge Open Space totals 217 acres, and extends from the Norwegian Grade (Moorpark Road) west to Wildwood Park. This area protects ridgelines that afford sweeping views of both the Conejo Valley and the Santa Rosa Valley. Plant communities include coastal sage scrub and chaparral. Two sensitive plants- Lyon's Pentachaeta and Conejo Dudleya- are found in this area, and the area also supports many wildlife species such as deer, coyote, and gray fox. The trail in this area connects to trails in Wildwood Park. Open space is owned by COSCA and CRPD, and a conservation easement on private property protects additional habitat.