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Race through one of San Fernando Valley's hidden gems in these scenic trail runs. With three distances to choose, runners of all capabilities are catered for. The course is hilly, commencing in the clouds at Lasky Mesa then you will descend into the Las Virgenes Canyon. Come for the epic scenery.

Ahmanson Trails routes


On race day, the course is marked with surveyor ribbons and arrows on the ground. There is always a possibility that hikers may tamper with course markings and this cannot be controlled. Always keep your eyes alert to your whereabouts. It is unlike that you will get lost during the race but if you notice you are not seeing arrows or ribbons, simply back-track to the last mark you saw and follow the course markings from there.

Sweepers will head out from the starting line and will stay behind the last participant. Sweepers will pull ribbons and yes, they will actually carry brooms to sweep arrows. Because course markings may be removed From you, it is important that you always move forward on the race course, to avoid getting lost.

Event Details

What’s Included


    Men’s and Ladies’ Technical Running Shirts
    Custom Finisher Medals
    Custom Award to First Place Male & Female Overall
    Custom Award to First Place Male & Female finishers in five-year Age Divisions
    Water station at 3-ish mile and at mile 5.5-ish –  all runners should carry one bottle
    Computerized Chip Timing


    First Place Overall Male/Female in each race will receive an award and comp entry into the 2020 race
    Age Division Awards will be 1st/2nd/3rd Male/Female in five-year divisions

Raceday Logistics
  • Pre-registered runners may pick up their bib beginning at 6:00 a.m.
  • Please present a photo ID to claim your bib.

Due to the need to keep aid stations open and accessible to emergency responders, we do not permit any runner crews or spectators at our aid stations. The best place for family and friends is to wait for you at the finish line.


For volunteer information, email [email protected]


Frequently Asked Questions

Can I sign up on race day?
You may sign up on race morning beginning at 6:30a.m. however there is no guarantee of getting your shirt size preference. Race day entry cash only.
When & Where is Bib Pick Up?
Bib pick up is located at the trailhead beginning at 6:00 a.m. Please present photo ID when picking up your bib.
Do I need to wear trail shoes?
Trail shoes are desirable but are not mandatory for all Trail Run Events races.
Have a question? Get answers from our team.

Is your question about booking your place? See our Help Center

Ahmanson Trails weather forecast

Clear throughout the day.

Predicted highs
Predicted lows

Meet the organizerIcon

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​Trail Run Events, LLC is home to Los Angeles County's premier trail races held in the pristine backcountry of the Santa Monica Mountains. Established in 2002 by Ultra Ladies Running Club, Trail Run Events offers beautiful and challenging trail runs for beginners and veterans alike. While you are enjoying the peaks and valleys, we are working behind the scenes to provide you the best in quality and safety in your trail running experience while preserving the integrity of our pristine backcountry trails.

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