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_Upcoming Events Accomplishments Environment Plantpalooza Plants Native

Native Plantpalooza & Eco Fest is back for 2025, bigger and better than ever

Native Plantpalooza & Eco Fest is returning for a fourth year! Please join COSF for our free educational festival featuring dozens of eco-related exhibitors and fun activities for kids. The community event will be held Read more

_Special Announcement Accomplishments Environment Speaker Series Wildlife

Wildlife researcher Ellie Bolas reveals the private lives of local mule deer—see her recorded presentation

Visit China Flat, Conejo Canyons, Rancho Sierra Vista or Satwiwa as the sun is rising. Watch in anticipation as it casts delicate morning light on the open canopy of the oak savanna, the frosted tips Read more

COSF 2025 Eco Scholarship winner Isabella Lee
_Special Announcement Accomplishments Environment Scholarships

Update on COSF’s 2025 Eco Scholarship Award

Isabella Lee is COSF’s new 2025 Environmental Studies scholar. Isabella, who graduated from Thousand Oaks High School, replaces Greceldy Hau as the recipient of one of COSF’s two scholarship awards because Greceldy will be pursuing Read more