Green and yellow colored hillsides with mountain peak

Conejo Open Space Conservation Agency


02/15/2024 - More Rain on the Way.  Current weather forecasts indicate more rain will arrive in our area on Sunday 2/18.  In light of that, we anticipate trails will likely need to be closed.  Please check our Facebook and Instagram pages (@conejoopenspace) for the most up-to-date closure info.

02/06/2024 - Interested in helping COSCA? Consider joining the Conejo Open Space Trails Action Committee! The Committee provides support for COSCA's volunteer programs, such as Trail Work Day, Special Trail Work Days, Trail Ambassadors, Trail Watch, Open Space Trails Education Days, Adopt-A-Trail, and Trailhead Outreach. Members serve 3-year terms and represent hikers, mountain bikers, and equestrians. Apply by March 7 at

12/01/2023 - Bridge Project Update!  The construction progress of our new bridge is proceeding smoothly.  In addition to the project information available at the link in the post below, here's a fun update video on YouTube:

9/21/2023 - New Bridge Coming Soon!
Many of you are familiar with our bridge near the Hill Canyon trailhead. The big news is that in partnership with the City of Thousand Oaks and CRPD, construction on a second bridge further up the treatment plant access road will be starting very soon! The bridge will improve trail access and give visitors the opportunity to avoid using the access road. More info at:!

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.