Conejo Open Space Foundation
  • About Us
    • Our Story…
      • Our Story
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    • History…
      • History of the Conejo Open Space
      • Historic Conejo Open Space Promotional Videos
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    • Open Space Programs
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    • Conejo Open Space Challenge 2026: March 1 to May 31
    • Speaker Series
    • Native Plantpalooza & Eco Fest for 2025
    • Trail Building and Restoration
    • Trails Education Days for 4th Graders
      • Video Overview
      • Recent Updates for Trails Education Days
      • Trails Education Days Videos
    • “Four Seasons” photo contest
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    • Scholarships for Environmental Studies
      • How to Apply
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  • Volunteering
    • Volunteering Overview
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    • Volunteer Report Forms
      • Adopt-A-Trail Report Form
      • Bike Bell Report Form
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    • Trail Work Notification Signup
    • COSCA Volunteer Manual
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  • Explore Open Spaces
    • Open Space Trails and Maps
      • Map Overview
      • Compact PDF Trail Route Guides
      • Conejo Canyons Open Space (Western Plateau)
      • Dos Vientos and Rancho Potrero Open Spaces
      • Lang Ranch, Woodridge and Oakbrook Regional Park
      • Los Robles Open Space area
      • Wildwood Park
      • Other Trails including North Ranch
      • List of Maps
    • Things to do and see
      • Open Space Activities
      • Native Plants
      • Non-Native Plants
      • Wildlife
      • Flora and Fauna Videos
    • Be Prepared
    • Rules of the Trails

_Special Announcement

_Special Announcement Social Media ONLY

It’s New Map Monday! Los Robles East, White Horse Canyon, Los Padres Figure Eight Loop

Highlights Beautiful oak forest at the bottom of Los Padres Trail Great views of Thousand Oaks and more from Los Robles Overlook More remote White Horse Canyon and Brookview Trails have few visitors and great views Description This is a moderately strenuous 8.5 mile double loop, with a total elevation Read more

By Steve Clark, 4 years06/20/2022 ago
Tropical milkweed
_Special Announcement Environment Plants Native Wildlife

Ventura County Bans Sale of Tropical Milkweed to Protect Monarchs

Because of its role in spreading disease among Western monarch butterflies, tropical milkweed (Asclepias curassavica) has been classified as a “noxious weed” by the California Department of Food and Agriculture. That led to a June 1 notice of a ban by Ventura County Agricultural Commissioner Ed Williams on its sale Read more

By Anne Russell, 4 years06/09/2022 ago
Heidi Marusa and "Jag" show students how to approach a horse.
_Special Announcement Accomplishments TED Updates Trails Education Days

Trails Education Days Makes a Comeback for 2022

Trails Education Days returned to Wildwood Park April 25 to 28 after a two-year hiatus caused by the COVID-19 pandemic. The goal of the program is to instill youngsters with an appreciation and sense of stewardship of natural open space. It provides lessons on open space for Conejo Valley Unified Read more

By Anne Russell, 4 years05/08/2022 ago
_Special Announcement Conejo OS Challenge

First photo gallery from the 2022 Conejo Open Space Challenge

These photos were all submitted via email by participants of the 2022 Conejo Open Space Challenge. Thanks to the open space enthusiasts who submitted their photos to share!

By Steve Clark, 4 years03/22/2022 ago
_Special Announcement Accomplishments COSCA Trails Trailwork

Conejo Spring Trail Work Day – What a Success!

On Saturday March 19 about 130 volunteers came to help restore the Santa Rosa Trail above Wildwood Mesa to like-new condition! There were enough volunteers that crews also worked on the Teepee, Moonridge and Stagecoach Bluff Trails. The photos in the gallery below are from workers on the Santa Rosa Read more

By Steve Clark, 4 years03/21/2022 ago
_Special Announcement Social Media ONLY

It’s New Map Monday: Skelton Canyon Trail in North Ranch!

Highlights Easy hike of only 2.2 miles, return. One of the segments of the 2022 Conejo Open Space Challenge (http://cosf.org/challenge) Description This is a broad singletrack trail that makes for an easy hike. The surface is gravel on a firm base with a moderate grade. There is no parking on Read more

By Steve Clark, 4 years03/07/2022 ago
_Special Announcement History

COSF Elects New Slate of Officers for 2022 Terms

The Conejo Open Space Foundation voted in three new officers and re-elected a current one to head the nonprofit, all-volunteer organization at its February 7 board meeting. The terms of the new executive group begins March 1. Jerry Westby, who served as COSF’s President for 3 years, stepped down and Read more

By Anne Russell, 4 years02/17/2022 ago
_Special Announcement Conejo OS Challenge

Announcing the 2022 Conejo Open Space Challenge!

Here’s your chance to explore some of the best trails in the Conejo Open Space that many people are not familiar with! From March 1st through May 31st the Conejo Open Space Conservation Agency (COSCA) is challenging mountain bikers, hikers, trail runners and equestrians of all ages to try out Read more

By Steve Clark, 4 years02/08/2022 ago
_Special Announcement Where in the Conejo

Zachary Russell won $25 in the Where in the Conejo photo contest – Congratulations!

The January 1 Where in the Conejo Contest photo was of the Indian Creek Trail. Of the correct entrants, Zachary was selected at random as the winner of a $25 gift certificate. Congratulations Zachary and thanks to all who entered the contest! The Indian Creek Trail is in Wildwood Park, Read more

By Steve Clark, 4 years01/09/2022 ago
_Special Announcement Where in the Conejo

We Have a ‘Where in the Conejo’ Contest Winner: Jeff Ross!

The December 1 “Where in the Conejo” photo was of a castor bean plant (Ricinus communis) in bloom. Castor bean is not native and has become a noxious weed in Southern California, although it has both commercial and landscape uses. Tolerant of drought, this fast-growing evergreen shrub in the euphorbia Read more

By Anne Russell, 4 years12/08/2021 ago

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