Conejo Open Space Foundation – Help us to support your local open space

Preserve, Promote, and Protect the Open Space The Conejo Open Space Foundation (COSF) 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 visitors as to their roles as custodians and protectors of the open space and the environment. We support and help fund ongoing programs sponsored by the Conejo Open Space Conservation Agency (COSCA). We are 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!


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Latest Updates (View all the updates.)

It’s New Map Monday in Conejo Canyons: Hill Canyon to Elliott Mountain (1/30/2023) - Highlights Moderate hike of 5.2 miles with about 800' of climbing Mountain bikers will find the Outlaw Loop and Elliott Mtn. Trails a challenging climb. One of the segments of the 2023 Conejo Open Space Challenge Description This is a moderate hike of 5.2 miles with 800′ of climbing. It starts with an easy stroll along the Hill Canyon Trail, climbs up the Western Plateau Edison Road, then turns onto the Outlaw Loop Trail that winds its way up to Elliott Mountain, which has tremendous views of the Western Plateau, Hill Canyon, Lizard Rock and Mt Clef Butte. Key… (read more...)
COSF announces 2023 scholarship program for environmental studies (1/20/2023) - COSF is pleased to announce that in the spring we will again award $1,000 scholarships to two Ventura County graduating high school students who will be pursuing a college major related to environmental studies. The Conejo Open Space Foundation 2023 Entering and Continuing College Scholarships will be given to applicants who have demonstrated a sincere and active interest in improving our natural environment and will be pursuing a career in the wide-ranging fields that focus on solutions to environmental problems and resource management. For students who are full time and maintain a 3.0 or better grade point average, COSF will… (read more...)
COSF’s Winter 2022 Newsletter is here! (1/11/2023) - The winter edition of our newsletter is now available! In this issue: Meet Your New COSCA Rangers Trail Savvy for New Bikers 'Where' Contest Returns as 'You in the Conejo' Plus: Spotlight on COSF board member Brendan Callahan How to volunteer and more... (read more...)
Repeat Winner: Randy Wagner Takes ‘Where in the Conejo’ Grand Prize Again! (12/23/2022) - This year, COSF’s popular “Where in the Conejo” monthly contest featured 12 trails or trailside phenomena, challenging contestants to identify them correctly. The previous year, we created a Grand Prize for whoever got the most answers correct. Randy Wagner of Thousand Oaks, who was last year's Grand Prize winner, answered 11 out of 12 “Where” questions correctly this year, besting all other participants again. He donated his $50 winnings back to COSF, although he did accept one of our newly minted t-shirts. (Which will be the prize offering in 2023.) As to how everyone else did, we had only one… (read more...)
David Filgas is the winner of our December ‘Where in the Conejo’ contest! (12/8/2022) - December's "Where in the Conejo" contest photo featured a manmade drainage area on the Bowfield Trail (answer to the bonus question, which only one person got right). Of the correct entrants, David Filgas was selected at random as the winner of a $25 gift certificate. Congratulations, David, and thanks to all who entered! (Of which, 100% got it right!) All of you recognized the ditch for what it is: Trail workers' efforts to steer water off the trail before it causes ruts down the middle via erosion. We are very glad that none of you think it marks an emergency… (read more...)
It’s New Map Monday in North Ranch: Bowfield Trail to Three Peaks (12/5/2022) - Highlights A good intermediate workout with several options Climb up to three peaks (and one sub-peak), all with great views all around For an even great workout, continue on moderately steeper trails southwest on the Saddle Pass Trail or southeast on the Aqiwo Trail to the Wishbone Loop Trail The nearby Lindero Creek Trail provides a relaxing and shady change of pace Description This is a route with a number of options, all of which lead to impressive views in every direction. The route starts at Bowfield Road near the North Ranch Playfield and goes to the viewpoint on Peak… (read more...)

Congratulations Jimmy Chow for winning the November ‘Where in the Conejo’ photo contest! (11/8/2022) - The November 1 Where in the Conejo contest photo was of the Powerline Trail. Of the correct entrants, Jimmy was selected at random as the winner of a $25 gift certificate. Congratulations and thanks to all who entered the contest!… (read more...)
Chaparral yucca on Bowfield Darryl Levi is the winner of our October ‘Where in the Conejo’ contest (10/9/2022) - October's "Where in the Conejo" contest photo featured a charred chaparral yucca seen along the Bowfield Trail post-Woolsey Fire. Of the correct entrants, Darryl Levi was selected at random as the winner of a $25 gift certificate. Congratulations, Darryl, and… (read more...)
2022 Autumn COSF Newsletter (9/17/2022) - The fall edition of the Conejo Open Space Foundation newsletter has been posted. In this edition… Native Plantpalooza & Eco Fest on Oct. 1 : COSCA Fall Trail Work Day Oct. 15 at Westlake Village Community Park : Agoura HOA… (read more...)
It’s New Map Monday: Los Robles East – Triunfo Bobcat Loop (9/12/2022) - Highlights Great view over Westlake Village, especially in the autumn when the trees are changing color A mix of trail types – singletrack trails and dirt roads Description This is moderate hike of about 4.25 miles with about 1000’ of… (read more...)
Congratulations Maryann Thomas for winning the September ‘Where in the Conejo’ photo contest! (9/8/2022) - The September 1 Where in the Conejo contest photo was of the Triunfo Canyon Trail. Of the correct entrants, Maryann was selected at random as the winner of a $25 gift certificate. Congratulations and thanks to all who entered the… (read more...)
It’s New Map Monday: Moonridge Trail, Paradise Falls, Two Springs Trail Loop from Wildflower Playfield Tennis Courts (8/15/2022) - Highlights This is the prettiest way to get to the very popular 40' high Paradise Falls Enjoy the beauty and tranquility of Wildwood Canyon away from crowds and dusty parking Easy short 2.9-mile loop along pretty canyon trails Two Springs… (read more...)