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.)
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...)
It’s New Map Monday: Vista Del Mar Loop in Dos Vientos (12/1/2025) - Highlights This route is 4.9 miles long with about 800' of ascent. The Twin Ponds, roughly half way along Vista Del Mar Trail. If there was a substantial amount of rain the preceding winter, there will be waterfowl in the ponds. The view is constantly changing on these hilly trails, overlooking Dos Vientos for much of the loop, but also… (read more...)
It’s New Map Monday: Oakbrook Vista Trail (11/24/2025) - Highlights This short out-and-back hike 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. In spring, the trail is lined with blooming purple sage in the lower sections, and other flowers higher up… (read more...)
CANCELED due to the Weather: November 22 Trail Work; Photos from September’s work (11/19/2025) - CANCELED due to the weather: November 22 Trail Work. The following text is from the original announcement. Join the COSCA rangers and other enthusiastic volunteers on November 22 to help fix up the Park View Trail above Dos Vientos Community Park! If you’re looking for for some ways to get exercise and expend some calories ahead of the holiday feasting… (read more...)
It’s New Map Monday: Reino Road to Twin Ponds in Dos Vientos (11/17/2025) - Highlights This route is 8.0 miles long with about 1300' of elevation gain. There will be waterfowl in the Twin Ponds if there was a enough rain during the preceding winter to keep the ponds from drying up. The view is constantly changing on these hilly trails, overlooking Dos Vientos for much of the way, but also overlooking Long Grade… (read more...)
News from COSF (View all the updates.)
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...) It’s New Map Monday: Vista Del Mar Loop in Dos Vientos (12/1/2025) - Highlights This route is 4.9 miles long with about 800' of ascent. The Twin Ponds, roughly half way along Vista Del Mar Trail. If there was a substantial amount of rain the preceding winter, there will be waterfowl in the ponds. The view is constantly changing on these hilly trails, overlooking Dos Vientos for much of the loop, but also… (read more...) It’s New Map Monday: Oakbrook Vista Trail (11/24/2025) - Highlights This short out-and-back hike 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. In spring, the trail is lined with blooming purple sage in the lower sections, and other flowers higher up… (read more...) CANCELED due to the Weather: November 22 Trail Work; Photos from September’s work (11/19/2025) - CANCELED due to the weather: November 22 Trail Work. The following text is from the original announcement. Join the COSCA rangers and other enthusiastic volunteers on November 22 to help fix up the Park View Trail above Dos Vientos Community Park! If you’re looking for for some ways to get exercise and expend some calories ahead of the holiday feasting… (read more...) It’s New Map Monday: Reino Road to Twin Ponds in Dos Vientos (11/17/2025) - Highlights This route is 8.0 miles long with about 1300' of elevation gain. There will be waterfowl in the Twin Ponds if there was a enough rain during the preceding winter to keep the ponds from drying up. The view is constantly changing on these hilly trails, overlooking Dos Vientos for much of the way, but also overlooking Long Grade… (read more...)Follow us on social media
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