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.)

COSF announces 2023 scholarship program for environmental studies (12/7/2022) - 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...)
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...)
It’s not too late to help your local open space (12/3/2022) - Founded in 2012, Giving Tuesday—observed on the Tuesday after Thanksgiving and the 4 days that follow—celebrates the spirit of philanthropy and charity. We invite you to help support your open spaces by making a gift of any size to the Conejo Open Space Foundation (COSF) today. COSF is unique because we are the only local non-profit organization that raises funds strictly for open space projects and programs. As an example of our activities, everyone across the Conejo Valley can join the fun and enhance their knowledge of our open spaces and our human connections to nature with our popular and… (read more...)
Where in the Conejo Contest for December 1, 2022 (12/1/2022) - You could win $25 if you can you identify the phenomenon shown in the photo! The correct answer is provided below along with 3 that are not. To be entered in the drawing to win, you must select the right one. When you encounter a dip and a rise in the trail such as the one marked in the photo, you know that it's: An indication that there’s an emergency exit slide down the side of the trail. A speed bump intended to remind all users to moderate their downhill pace. A drain built to minimize erosion from rainfall. A collapsed tunnel… (read more...)
It’s New Map Monday: Powerline Trail from Dos Vientos Community Park to the 101 Overlook (11/7/2022) - Highlights A great example of the Conejo Valley's volcanic landscape A great workout A great view of Dos Vientos, and the landscape north of the 101 Freeway Description This is an out-and-back hike or ride that starts at Dos Vientos Community Park and turns around at an overlook of the 101 Freeway, about 250’ above it. Most of the route is along an Edison Road that climbs to near the top of Conejo Mountain. If you want a shorter route you can park on Via Ricardo instead of at the park. For a much shorter route, turn around at the… (read more...)
Sage Publishling volunteers at Conejo Canyons Trailhead Newbury Park, CA with COSF and COSCA Sage Publishing Volunteers Clean Up the Conejo Canyons Trailhead (10/30/2022) - Nine volunteers from Sage Publishing joined COSF board members Anne and Tania and COSCA rangers Joe and Ryan to clean up the Conejo Canyons Trailhead in Newbury Park on October 20. A short walk from Sage’s offices on Conejo Spectrum St., the trailhead was in need of attention not only because of windblown food wrappers and other debris, but because someone had illegally dumped broken patio furniture and a carpet. The team picked up trash in the parking lot, at the start of the trail, and along Conejo Center Dr., ultimately collecting over 100 lbs. of garbage. One of the… (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...)
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...)
Insect activity on flower cluster Alicia Di Rado is the winner of the August ‘Where in the Conejo’ photo contest! (8/8/2022) -   The August 1 "Where in the Conejo" contest photo featured a hairstreak butterfly feeding on buckwheat flowers while a bee assassin captured a honeybee. Of the correct entrants, Alicia Di Rado was selected at random as the winner of… (read more...)