Conejo Open Space Foundation
The Conejo Open Space Foundation is dedicated to helping preserve, promote and protect natural open space through community education and involvement. We support these efforts by fundraising and volunteer engagement.
2025: 30 years of connecting community and nature!
Upcoming Events
News from COSF (View all the updates.)
Year-end giving deadline near, COSF President Bill Miller notes (12/29/2025) - The Conejo Open Space Foundation is deeply grateful to the many supporters of our mission to preserve, promote, and protect natural open spaces through community education and involvement. As COSF finishes our 30th anniversary holiday season, we celebrate both what we’ve accomplished together and urge you to consider one final tax-deductible gift for 2025. Your donation will support programs that:… (read more...)
It’s New Map Monday: Lynnmere, the Whole Enchilada, in Wildwood (12/29/2025) - Highlights This moderately strenuous route covers the entire trail and also Thistle Trail for a shortcut to get back to the beginning. The south leg traverses a ridgeline that is high enough to not only overlook the neighborhoods immediately to the south, but also the farther away neighborhoods of Wildwood. For mountain bikers, the north leg is a must-ride trail.… (read more...)
2025 Winter COSF Newsletter (12/28/2025) - The winter edition of the Conejo Open Space Foundation newsletter has been posted. In this edition… Plantpalooza summary : "Raptors in Peril" recording ready for viewing : Newest COSCA Ranger Brittany Schiefer : Spotlight on Brian Stark, COSCA Administrator : High school scholarship announcement : Open Space Appreciation Hike schedule : and Much More! View our Winter Conejo Open Space… (read more...)
It’s New Map Monday: Oakbrook Vista & Hidden Meadow Trails (12/22/2025) - Highlights Oakbrook Vista Trail quickly gains elevation to give a good view over Oakbrook Regional Park and Lang Ranch Open Space to the north. You'll get a great view of Albertson Motorway as it winds it's way up the hills. Hidden Meadow Trail is really fun on a mountain bike Hidden Meadow Trail has a great wildflower display in the… (read more...)
It’s New Map Monday: Brookview Loop in Los Robles East (12/15/2025) - Highlights Brookview Trail runs mostly along a ridgeline so you get great views to the south over Lake Sherwood and north over Thousand Oaks. Brookview and White Horse Canyon Trails are quite remote and rugged, so they are great for getting away from the crowds. Brookview Trail is a segment of the 2026 Conejo Open Space Challenge (https://cosf.org/challenge; colored pink… (read more...)
It’s New Map Monday: Oakbrook Vista & Little Sandstone Trails (12/8/2025) - Highlights Oakbrook Vista Trail quickly gains elevation to give a good view over Oakbrook Regional Park and Lang Ranch Open Space to the north. You'll get a great view of Albertson Motorway as it winds it's way up the hills. The very rugged Little Sandstone Trail passes through what could be some of the most beautiful sandstone rock formations in… (read more...)
Fall ‘Four Seasons’ photo contest winner is Marilyn Wells! (12/3/2025) - For our Winter 'Four Seasons' contest the challenge subject is Conejo Valley wildlife (i.e., birds, reptiles, bugs, mammals, etc.). Deadline for entry is February 28, 2026. If you would like to enter future contests, here are the rules: Every season, we’ll identify a specific item (e.g., “an oak tree”) for you to find within the Conejo Open Space. As long… (read more...)
Raptor expert Jaclyn DeSantis warns about dangers hawks, owls and eagles face—from us! See her recorded presentation (12/1/2025) - On November 19, Jaclyn DeSantis, education program manager at the Ojai Raptor Center presented “Wild Neighbors: Raptors, Rehabilitation, and the Human Connection” as the final talk of 2025 in COSF’s popular Speaker Series. DeSantis is a licensed wildlife rehabilitator and she has seen a lot of injured birds during her 15 years at the Ojai Raptor Center. She says most of these… (read more...)
News from COSF (View all the updates.)
Year-end giving deadline near, COSF President Bill Miller notes (12/29/2025) - The Conejo Open Space Foundation is deeply grateful to the many supporters of our mission to preserve, promote, and protect natural open spaces through community education and involvement. As COSF finishes our 30th anniversary holiday season, we celebrate both what we’ve accomplished together and urge you to consider one final tax-deductible gift for 2025. Your donation will support programs that:… (read more...) It’s New Map Monday: Lynnmere, the Whole Enchilada, in Wildwood (12/29/2025) - Highlights This moderately strenuous route covers the entire trail and also Thistle Trail for a shortcut to get back to the beginning. The south leg traverses a ridgeline that is high enough to not only overlook the neighborhoods immediately to the south, but also the farther away neighborhoods of Wildwood. For mountain bikers, the north leg is a must-ride trail.… (read more...) 2025 Winter COSF Newsletter (12/28/2025) - The winter edition of the Conejo Open Space Foundation newsletter has been posted. In this edition… Plantpalooza summary : "Raptors in Peril" recording ready for viewing : Newest COSCA Ranger Brittany Schiefer : Spotlight on Brian Stark, COSCA Administrator : High school scholarship announcement : Open Space Appreciation Hike schedule : and Much More! View our Winter Conejo Open Space… (read more...) It’s New Map Monday: Oakbrook Vista & Hidden Meadow Trails (12/22/2025) - Highlights Oakbrook Vista Trail quickly gains elevation to give a good view over Oakbrook Regional Park and Lang Ranch Open Space to the north. You'll get a great view of Albertson Motorway as it winds it's way up the hills. Hidden Meadow Trail is really fun on a mountain bike Hidden Meadow Trail has a great wildflower display in the… (read more...) It’s New Map Monday: Brookview Loop in Los Robles East (12/15/2025) - Highlights Brookview Trail runs mostly along a ridgeline so you get great views to the south over Lake Sherwood and north over Thousand Oaks. Brookview and White Horse Canyon Trails are quite remote and rugged, so they are great for getting away from the crowds. Brookview Trail is a segment of the 2026 Conejo Open Space Challenge (https://cosf.org/challenge; colored pink… (read more...) It’s New Map Monday: Oakbrook Vista & Little Sandstone Trails (12/8/2025) - Highlights Oakbrook Vista Trail quickly gains elevation to give a good view over Oakbrook Regional Park and Lang Ranch Open Space to the north. You'll get a great view of Albertson Motorway as it winds it's way up the hills. The very rugged Little Sandstone Trail passes through what could be some of the most beautiful sandstone rock formations in… (read more...) Fall ‘Four Seasons’ photo contest winner is Marilyn Wells! (12/3/2025) - For our Winter 'Four Seasons' contest the challenge subject is Conejo Valley wildlife (i.e., birds, reptiles, bugs, mammals, etc.). Deadline for entry is February 28, 2026. If you would like to enter future contests, here are the rules: Every season, we’ll identify a specific item (e.g., “an oak tree”) for you to find within the Conejo Open Space. As long… (read more...) Raptor expert Jaclyn DeSantis warns about dangers hawks, owls and eagles face—from us! See her recorded presentation (12/1/2025) - On November 19, Jaclyn DeSantis, education program manager at the Ojai Raptor Center presented “Wild Neighbors: Raptors, Rehabilitation, and the Human Connection” as the final talk of 2025 in COSF’s popular Speaker Series. DeSantis is a licensed wildlife rehabilitator and she has seen a lot of injured birds during her 15 years at the Ojai Raptor Center. She says most of these… (read more...)Follow us on social media
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