Help support your local open space

Helping to Preserve, Promote, and Protect Our Open Space

This website illustrates ongoing programs sponsored by the Conejo Open Space Conservation Agency and supported by the Conejo Open Space Foundation that help preserve and protect our precious open space.

Latest Updates (View all the updates.)

COSCA has a new emblem! (1/13/2020) - The Conejo Open Space Conservation Agency, COSCA, starts off the new year of 2020 with a brand new emblem, shown to the right. The earlier emblem, below, dated to the time that COSCA was created in 1977. That emblem has… (read more...)
Ancient Conejo Open Space promotional videos (12/31/2019) - We found these old (and we mean – ancient!) videos kicking around. They’re so old that nobody remembers anything about them. Don’t try calling the on-screen phone number – we don’t know who it belongs to, if anyone. You can… (read more...)
2019 Winter COSF Newsletter (12/23/2019) - Happy Holidays : Trail Trivia - Shooting Star Trail : Holiday Party and COSF donation to New Hill Canyon Bridge : Spotlight on Christina Robertson : Free Hikes : Tarantula Hill : Old Hill Canyon Bridge restored : Non-native Plants… (read more...)
COSF President gives $30,000 check to COSCA (12/7/2019) - During the annual Holiday Party where COSCA, COSTAC and COSF contributors celebrate the year with like-minded open space enthusiasts, COSF President Jerry Westby handed over a check for $30,000 to COSCA Administrator Brian Stark. The funds came from COSF donors… (read more...)
Nov 14 Where in the Conejo Contest photo was of the Whole Access Trail (11/27/2019) - The photo of the November 14th issue of the Thousand Oaks Acorn, shown here, was of the Whole Access Trail, part of the Oak Canyon Loop Trail. Congratulations to Jill Pechter who provided the correct answer and was selected as… (read more...)
2019 Fall Trail Work Day, October 19, 2019 (10/19/2019) - About 80 open space enthusiasts came out to help fix up the trails in the Conejo Canyons in preparation for winter rains. Volunteers came from various organizations such as the Santa Monica Mountains Trails Council (SMMTC), the Concerned Off-Road Bicyclists… (read more...)

The Foundation is a 501(c)(3) nonprofit corporation formed in 1995 to promote, support and help maintain the open space and trail system of the Conejo Valley and to educate residents as to their roles as custodians and protectors of the open space and the environment.

COSF is funded through individual, business, and corporate memberships, donations and grants. Funds received by COSF are highly leveraged through the extensive use of unpaid community volunteers and other in-kind donations.

Educate We volunteer to protect and preserve our precious open space. One great way to do this is by educating the youth of our community. Interested in working with Conejo Valley fourth graders? Join us at our next Trails Education Days.

Fund Raise The Conejo Open Space Foundation raises funds for many outdoor projects, such as the bridge crossing in Hill Canyon, Bike Bells, and Trails Education Days. Support our efforts by becoming a member or making a donation at our Membership page.

Volunteer The Conejo open space wouldn’t be the same without the hundreds of people who give their time and energy. The COSCA volunteer corps offers many ways to stay involved in the open space. Join us and make a difference today!