Saturday, Sep 4, 2021 @ 7:30 AM
Registration closes: Wed, Sep 1 @ 11:59 PM


We know you have many races to choose from and we thank you for supporting this amazing event in beautiful Griffith Park. Whether you're a "newbie" running your first ultra, a 100-mile hopeful or a competative pro, we promise to give you a safe and professional race experience. Trail Run Events brings you 20-years of awesome races in beautiful places and Cirque is our crowning glory!

This event is not able to guarantee a permit for June due to covid restrictions. We have set the new date for September 4 & 5 which is also Labor Day Weekend and will give you an extra recovery day before returning to work. Your registration is an RSVP and your credit card will not be charged until we secure a permit.


  • Men's and Ladies' Dri-Fit Race Shirts
  • Customizes belt buckles to runners reaching 100-miles or more
  • Customized Finisher Awards showing your name and total mileage run
  • One aid station stocked with water, ice, soup and coffee at night. Due to covid restrictions, runners will need to provide their own water, drinks and food.
  • Approximately 2.43 miles per loop
  • Approximately 72' gain and loss per loop
  • Computerized Chip Timing

  • Activities for your non-running friends and family - LA Zoo, Griffith Park Pony Rides & Carousel, hiking, cycling, Hollywood Sign, Golf, Travel Town, Autrey Museum. Close to Hollywood and Griffith Park Observatory.

    Start and Finish Times

    This 100-mile event begins at 7:00am on Saturday and ends at 1:00pm on Sunday. 30-Hours to complete your 100!


    We have a feature on Ultra Signup where you can sign up for the race today but your credit card won't be charged. Once we know for sure that the race is a "GO", we will notify you and you can then authorize your payment.

    Think of it as an RSVP for the race or a waitlist, only the race isn't full. It just holds your place in the race until we know for sure that the park will be opened and we have permits in place.

    This is a "WIN WIN" because you don't have to pay anything right now and this lets us know if runners are actually interested in running on JUNE 26.

    2020 ROLLOVERS

    If you requested a rollover from 2020 to 2021, please send an email to us at

    Registration Info

  • Pre-registration is online only. We do not accept mail-in registration.
  • Race day registration is available until 15 minutes before the event start time.
  • Shirts and shirt sizes are not guaranteed for runners who register after May 1.
  • Race management reserves the right to refuse entry to anyone, for any reason.
  • Runners must be at least 18 y/o to run the race.
  • Online registration will generate an email to you. Please check your SPAM folder if your email does not arrive.

    **Due to the cost of permit fees, we will not be able to issue comp entries for this event.

    Pacers, Crews, Etc.

    You may set up a 10x10 shade cover on the lawn adjacent to the race course. Due to covid, we may need to restrict the number of pacers/crew per runner. We will update when we have more informtion.

    Run For Dawg Squad

    The Dawg Squad is a non-profit 501(c) 3 corporation established according to California laws for public benefit. They provide medical attention, training, rehabilitation, loving foster and permanent homes for at-risk animals who are homeless or have been abandoned and are in need of medical care. The have proudly rescued and placed over 1,800 animals in loving homes!

    Please consider taking pledges from family and friends to support this worthy cause. All pledges are tax deductible for the donor.

    Please check out their website:

    Please direct your donations to

    Local time: 9:16 AM
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