Green and yellow colored hillsides with mountain peak

Conejo Open Space Conservation Agency


04/16/2024 - It's Getting to be Wildflower Time!  A wide variety of wildflowers call COSCA open space home and we have a handy Guide to help you identify them.  As you head out to view these colorful floral treasures, help preserve their fragile beauty by following these simple guidelines: Take only photographs, not flowers. Take photographs OF flowers, not IN flowers, and please keep your feet on designated trails.  Thank you!

03/14/2024 - Access to the Hidden Rim Trail and the Hill Canyon Fire Road from the north side of Rancho Conejo Blvd. is temporarily closed.

03/01/2024 - The 2024 Conejo Open Space Challenge is underway! This is a great opportunity to explore some fun trails in our local open space that you might not know about. From March 1st through May 31st we're challenging mountain bikers, hikers, trail runners, and equestrians of all ages to try out the trails we're featuring this year. See if you can complete all 10! More info at:

03/01/2023 - Bridge Project Update.  The construction progress of our new bridge is proceeding smoothly.  In addition to the project information available at, here's a fun update video on YouTube:

New! Monthly Trail Work Opportunities!
In addition to our Fall and Spring trail workdays, we’re launching a monthly trail work program.  The program will take on smaller projects with crews of approximately 20 volunteers. The expansion will provide more opportunities for community members to participate in trail work projects and provide COSCA the opportunity to address a variety of trail projects throughout our open space and trail system.

If you’re interested in participating, please register for events through the Conejo Recreation and Park District at Click the pink “Registration” button and search for “COSCA” to find event dates and locations. Each event will have sign-up limits so the number of volunteers is matched to the needs of the project. If you’re interested in getting alerts for upcoming volunteer opportunities, sign up with COSCA’s partners at

Leave No Trace Guidelines
Keeping our community open spaces clean, healthy, safe, and enjoyable takes a community-wide effort. By following a few simple guidelines, you can be part of COSCA's open space care team. For tips on outdoor ethics, see our Leave No Trace page.