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.)

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! The Powerline Trail is an Edison Road that starts by switchbacking up Conejo Mountain before heading down the crest into a valley with an abundant display of volcanic rocks, a testament to the geologic history of the Conejo Valley. It ends in the north at a locked gate next to the 101 Freeway. There is a spot not far from… (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...)
COSCA Fall Trailwork Day 2022 John Kross Wishbone Trail COSCA Fall Trail Work Day 2022 Fixes Up the Wishbone Trail (10/28/2022) - An enthusiastic crowd of 55 volunteers turned out early on a cool, overcast morning to work on the Wishbone Trail behind the Westlake Village Community Park on October 15. The trail, which was completed a mere three years ago and is the newest in the Conejo Open Space system, needed clean-up due to hillside sloughing, as well as reshaping in some sections. There was also some overgrown brush that needed cutting back. The multiple teams of volunteers, overseen by 12 crew leaders from the Santa Monica Mountains Trails Council and volunteer liaison John Kross, spread out across the wishbone-shaped trail,… (read more...)
Board members at the COSF booth at Native Plantpalooza & Eco Fest Inaugural Native Plantpalooza & Eco Fest Draws Crowds of Plant Enthusiasts (10/26/2022) - On Saturday, October 1, COSF launched a live event as part of its popular Speaker Series: Native Plantpalooza & Eco Fest at Conejo Creek North Park. The first-year, free event, which was blessed with mild, sunny weather, featured beekeepers, butterfly experts, master gardeners, naturalists, and others.  Attendees enjoyed presentations from a distinguished lineup including master gardener and herbalist Laura Pasetta of Wild Rootz, Growing Works manager Jenn Rodriguez, nursery manager and restoration volunteer coordinator for the Santa Monica Mountains National Recreation Area Antonio Sanchez, and beekeeper Steve Savage Exhibitors included representatives from the California Wildlife Center, Betina’s Butterfly Garden, the… (read more...)
It’s New Map Monday: Fort Trail – Two Springs Trail Loop from Wildflower Playfield (10/17/2022) - Highlights Enjoy the beauty and tranquility of Wildwood Canyon without the crowds or dusty parking Easy short loop along park walkways and pretty canyon trails Two Springs Trail is closed to mountain bikers and equestrians because of stairs Includes two tunnels that pass underneath Avenida de los Arboles Description The walking trails of Wildflower Playfields and Fort Wildwood Park (AKA WildwoodNeighborhood Park) are an easy stroll, possibly with lots of other people around. In contrast, onthe pretty and tranquil trails in the canyons, you aren’t likely to see many people, if any. This is awelcome change from the main part… (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...)
Monarch butterflies now listed as endangered: What we can all do to help them (7/25/2022) - The migratory monarch butterfly has been added to the endangered species 'Red List' by the International Union for the Conservation of Nature in mid-July 2022. This colorful butterfly is known for its spectacular migration of up to 2,500 miles from… (read more...)