Fire-Related Closures

No current closures.


Weather-Related Closures

For public safety purposes and to prevent trail damage, COSCA trails may be closed during certain conditions.

Please see our Facebook page for the most current info.


Rain Events

COSCA trails are closed during most rain events and will remain closed until mud is no longer present.


Construction-Related Closures


The City of Thousand Oaks is making improvements at its La Granada Reservoir off Mountain Crest Circle adjacent to the Hillcrest Open Space area.  During construction, portions of the Ray’s Way, La Granada, and Dapple Gray Trails will be intermittently closed.


The intermittent closures are anticipated to start July 18 and may occur for approximately one (1) year.  Signage will be placed on the affected trail sections to advise users of these closures.  Notice of closures will be posted onsite and on our website 48-hours in advance.


Current Status: As of Wednesday, July 22, trails will be closed until further notice.


More information about the City’s project can be accessed at:


Red Flag Warnings

COSCA trails may also be closed during "Red Flag" fire weather.  The National Weather Service issues Red Flag warnings when the potential for fire becomes high in Southern California.  Fire potential increases when the following conditions  occur:

  • Hot, dry weather
  • Wind from the east at speeds of 25 mph or more, gusts of 35 mph or more
  • Low relative humidity, at or below 15%
  • Abundant dry vegetation


During Red Flag conditions please be aware of your surroundings and keep an eye out for smoke.  If you see smoke, please report it!  Also, always let someone know your whereabouts, and be prepared to evacuate quickly.


During Red Flag Warnings please adhere to the following guidelines:


  • No smoking.
  • No fire of any kind.
  • Curtail any work that will involve equipment that can spark a fire.
  • Keep fire suppression equipment, shovels, fire extinguishers and/or garden hoses handy and in good condition.


Although we always want people to enjoy Conejo Open Space it may also become necessary to close the Open Space if any of the following additional conditions exist:

  • Fire currently in the local area
  • Reason to suspect arsonist operating in the area
  • Draw down of fire resources in the local area
  • Winds sustained over 30 mph, gusts over 45 mph
  • Burning Index over 175
  • Over 180 days since precipitation
  • 14 days since overnight moisture recovery

COSCA is a joint powers agency between the City of Thousand Oaks and Conejo Recreation and Park District

2100 Thousand Oaks Blvd., Thousand Oaks, CA 91362   |   805.449.2345

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