Conejo Open Space Foundation
  • About Us
    • Our Story…
      • Our Story
      • Board of Directors
      • Accomplishments
    • History…
      • History of the Conejo Open Space
      • Historic Conejo Open Space Promotional Videos
    • Connect With Us
    • Links to Our Friends
    • What are these: COSCA, COSTAC, COSF, CRPD…
    • Privacy Policy as of 2019-06-04
  • Support Us!
    • Overview
    • Volunteer
    • Make a Donation
    • More Ways To Give
  • Get Involved
    • Open Space Programs
    • Event Signup
    • Volunteer!
    • 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
      • Sign up for notifications!
    • Scholarships for Environmental Studies
      • How to Apply
      • Scholarships News
  • Volunteering
    • Volunteering Overview
    • Apply to Volunteer
    • Volunteer Report Forms
      • Adopt-A-Trail Report Form
      • Bike Bell Report Form
      • Trail Ambassadors Report
      • Trail Watch Report
      • Log your Trail Work Events
    • Trail Work Notification Signup
    • COSCA Volunteer Manual
  • News
    • Latest News
    • Current Newsletter
    • Newsletter Archive
    • Sign up for our Newsletter!
    • Press Releases
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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

Conejo OS Challenge

_Special Announcement Conejo OS Challenge Safety Trails

New Conejo Canyons Vehicle Bridge to Open Soon: Videos of the Construction

By Steve Clark, 2 years01/15/2024 ago
_Special Announcement Accomplishments Conejo OS Challenge

Conejo Open Space Challenge wrap-up and final photo gallery

The wrap-up celebration for those Challenge participants, with a prize give-away for those who completed it, was held Friday afternoon June 2. Included in the prizes were $200 of gift cards that were contributed by COSF. One lucky young woman won a mountain bike worth $1500, donated by Giant Bikes Read more

By Steve Clark, 3 years06/12/2023 ago
Conejo OS Challenge

Prize Giveaway for Conejo Open Space Challenge finishers on Friday June 2

A celebration and prize giveaway for the people who completed the 2023 Conejo Open Space Challenge  will be held on Friday June 2 at the Lakeside Area of Conejo Creek North at 6 pm. Here’s a link to the location in Google Maps. Don’t miss your chance to celebrate your Read more

By Steve Clark, 3 years05/31/2023 ago
Conejo OS Challenge

Only 2 days left to complete the 2023 Open Space Challenge!

The Conejo Open Space Challenge ends on May 31 – if you haven’t finished it yet, it’s time to get serious! Here is the latest gallery of photos submitted by the participants. This time there are 48 photos. There are still lots of flowers blooming, and the weather looks decidedly Read more

By Steve Clark, 3 years05/29/2023 ago
_Special Announcement Conejo OS Challenge Social Media ONLY

It’s New Map Monday in Lang Ranch: Moderate Lang Ranch Loop

Highlights Moderate hike of 4 miles Good for conditioning because the Alapay and Meadow Vista Trails are quite steep Good views of Simi Valley and Lang Ranch Open Space Alapay Trail is one of the segments of the 2023 Conejo Open Space Challenge (https://cosf.org/challenge; colored green on the map) Description Read more

By Steve Clark, 3 years05/23/2023 ago
_Special Announcement Conejo OS Challenge

A gallery of 36 more Open Space Challenge photos before it ends in a few days

If you haven’t completed The Challenge yet, you have less than 2 weeks before it ends on May 31. If you want to be eligible for some prizes at the June 2 completion celebration, you better get hopping! This is the fifth gallery of photos from Challenge participants. The number Read more

By Steve Clark, 3 years05/20/2023 ago
_Special Announcement Conejo OS Challenge

May 31 is the last day of the Conejo Open Space Challenge!

Now that the trails have (mostly) dried up after this winter’s rains, now is a good time to get out and finish The Challenge! The last day is Wednesday May 31, just over two weeks from now. The wildflowers next to the trails and on the hillsides are spectacular this Read more

By Steve Clark, 3 years05/18/2023 ago
_Special Announcement Conejo OS Challenge

Photos from two months of the Conejo Open Space Challenge

Here’s the third gallery of photos from people hiking and riding our local trails to complete the Conejo Open Space Challenge. There is one month to go – still plenty of time to complete The Challenge, even if you haven’t started yet! The vast majority of photos are being submitted Read more

By Steve Clark, 3 years04/29/2023 ago
Conejo OS Challenge

Photos from Conejo Open Space Challenge participants – the things they saw!

Here’s the second gallery of photos from people hiking and riding our local trails to complete the Conejo Open Space Challenge. There are 60 photos in this gallery. The vast majority of them are being submitted by email to coschallenge@gmail.com as were all of these. Don’t see any of your Read more

By Steve Clark, 3 years04/15/2023 ago
Conejo OS Challenge

Conejo Open Space Challenge photo gallery – First of many?

This is the first gallery of photos that were submitted by participants of the 2023 Conejo Open Space Challenge. They were all emailed to coschallenge@gmail.com. When traveling the trails, please keep the weather forecast in mind and stay home when they’re still wet after recent rains! You can check this Read more

By Steve Clark, 3 years03/18/2023 ago

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