Welcome to the Endurance Race Series!

Weather you are a competitive trail racer, an avid runner, or a trail beginner, the ERS has what you are looking for... Challenging, yet beginner friendly race courses, spectacular views, family friendly atmosphere, and a fun post race celebration.

Oh... and free race photos for all runners to enjoy after each race.

 Registration Includes:

  • Professional Chip Timing

  • Finishers Medals

  • Overall Winner Awards

  • Age Group Awards

  • Free Race Photos

  • Finish Line BBQ

  • Free Beer (when allowed)


  • Louisville Half Marathon, 10k, 5k
    Louisville Half Marathon, 10k, 5k
    Louisville Community Park
    Aug 28, 7:00 AM
    Louisville Community Park , 955 Bella Vista Dr, Louisville, CO 80027, USA
    The course is a mostly flat with a beautiful, yet challenging hill that creates an epic vista point of the front range mountains as you hit the last mile of the course.
  • Snow Mountain Ranch Trail Festival
    Snow Mountain Ranch Trail Festival
    Sep 18, 7:00 AM – Sep 19, 11:00 AM
    Granby, 1101 Co Rd 53, Granby, CO 80446, USA
    Regardless of distance... these courses keep all runners surrounded by the changing colors, rolling hills, and picturesque views, making this location and courses still the "Most Beautiful ERS Course".
  • Carmel Valley Trail Race
    Carmel Valley Trail Race
    Torrey Highlands Park
    Oct 16, 7:00 AM
    Torrey Highlands Park, Corner of, Lansdale Drive, and, Del Mar Heights Rd, San Diego, CA 92130, USA
    Participants at the 7th annual Carmel Valley trail race, regardless of distance, will experience one of the hillier courses you will find without heading to the mountains. Elevation gains are only between 300'-700" depending on the course, and some of the hills you may encounter are short, but STEEP
  • Catalina Half and 10K
    Catalina Half and 10K
    Santa Catalina Island
    Nov 13, 8:00 AM
    Santa Catalina Island, Santa Catalina Island, California 90704, USA
    California's ultimate trail half-marathon will challenge you with climbs, peaks and vistas unlike any you will experience at any other half marathon. You will start in the town of Avalon, run past the Wrigley Mansion, and then enter the Interior for a few miles of climbs.
  • Black Mtn Turkey Burner
    Black Mtn Turkey Burner
    Black Mountain Ranch Park
    Nov 27, 7:00 AM
    Black Mountain Ranch Park, 14700 Carmel Valley Rd, San Diego, CA 92129, USA
    Join us November 27, for our 4th Annual event and burn off all that Thanksgiving food, as we race up and over Black Mountain peak in the beautiful Rancho Penesquitos area of North County San Diego.



What We Know about 2021




  • ALL races, regardless of location will once again host a post race BBQ and Awards Ceremony*.

  • ALL races, regardless of location will offer a mass start for each race distance. 

  • Race start times will be adjusted to accommodate the mass starts.  

  • The Kids Dash will return for those kids 8 years and younger. 




Trail Running is not just for adults...


The ERS is excited to offer our very popular "Kids Dash". These races are geared toward those kids 10 years and younger, and will measure between 1/4-1/2 mile in distance based on the kids participating. 


2021-22 San Diego Races... All proceeds raised will benefit Girls on the Run San Diego



In an attempt to minimize our footprint the ERS is now a CUPLESS race series. 

What is CUPLESS Racing?  The ERS will provide the aid stations on course with electrolyte and water, while runners will need to provide a hydration vest, bottle, or reusable cup to use at the aid stations. Runners are allowed to fill up as much as needed




If you are a local (or national) company looking to be a part of a fun, family friendly Finish Line Festival at some of the best trail races in Colorado and San Diego, then the ERS has a spot for you. 

If you are interested in becoming a Sponsor to the ERS, please email us HERE, so we can get you some more info. If you are interested in becoming a vender at one of our events then follow the link below to sign up.



The ERS is proud to offer additional race and event consulting and marketing services to help other organizations make their race visions a reality.   


Service include but not limited too; Race Management, Sponsorship Sales, Race Announcer, Marketing and graphic design


"The ERS staff goes out of their way to give you the best trail race experience ever"

- Mandi R. 

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