Conejo Open Space Overview

COSF in the Conejo Open Space

More than 15,000 acres, about one third of the area of Thousand Oaks in the Conejo Valley, has been designated as permanent open space. This provides room for native plants and animals, and vast areas for open space enthusiasts to enjoy more than 170 miles of trails.

Activities Calendar



Rules of the Trails

Overview Map


Wildflowers &
Native Plants


« of 112 »


The COSCA Volunteer Corps has many ways for you to help maintain and preserve the open space that surrounds our beautiful Conejo Valley. By joining with other residents, you can insure that the trails, canyons, and ridges will remain in good condition for future generations.

Interested in volunteering in the open space?

Volunteer Program Summaries

  • Adopt-A-Trail – Maintenance and improvements by individuals or groups of their “adopted” trails
  • Community Outreach – Volunteers providing open space trail maps, literature and information to the public
  • Resource Stewardship – Volunteer participation in a variety of natural resource-related open space projects
  • Trails Education Days – Annual open space education program for CVUSD 4th grade students
  • Trail Ambassadors – Hiker, mountain biker or equestrian uniformed patrols of open space areas
  • Trail Watch – Informal trail monitoring and maintenance
  • Trail Work Day – Community-wide trail maintenance event held in March and October


The Conejo Open Space Foundation raises funds for many COSCA open space projects, including the bridge crossing in Hill Canyon, Bike Bells, Resource Management, and Trails Education Days. Support our efforts by becoming a member or making a one-time donation.

Interested in supporting the open space?