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Welcome Trail Family!

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

Oh... and free race photos for all runners to enjoy post race. 


  • Mountain Ridge Trail Race
    Sun, Apr 30
    Highlands Ranch
    Apr 30, 6:30 AM
    Highlands Ranch, 10590 Mountain Vista Ridge, Highlands Ranch, CO 80126, USA
  • Barr Lake 30K and 15K
    Sun, May 14
    May 14, 7:00 AM
    Brighton, 13401 Picadilly Rd, Brighton, CO 80603, USA
  • Westminster Trail Race
    Sat, Jun 24
    Jun 24, 7:00 AM
    Westminster, 10200 W 100th Ave, Westminster, CO 80021, USA
    The 11th Annual event is a great course for those competitive, intermediate, or novice runners. The trails are mix of packed dirt trails , single track, and some minimal bike path.
  • South Bay 24
    Sat, Aug 12
    San Diego
    Aug 12, 7:00 AM
    San Diego, 3020 Coronado Ave, San Diego, CA 92154, USA
    The 2nd annual event has found an official home at Montgomery Waller Community Park in San Diego. The park is located just a few miles from Imperial Beach and Chula Vista. The course will feature a 1.3 mile loop course with a combination of Grass and Bike Path terrain.
  • Louisville Half Marathon, 10k, 5k
    Aug 26, 7:00 AM
    Louisville, 955 Bella Vista Dr, Louisville, CO 80027, USA
  • Snow Mountain Ranch Trail Festival
    Sep 23, 6:30 AM
    Granby, 1101 Co Rd 53, Granby, CO 80446, USA
  • Black Hawk- CANCELLED
    Time is TBD
    Time is TBD
    Golden, 92 Crawford Gulch Rd, Golden, CO 80403, USA
    If you are looking for one of the best "hill" courses the ERS has to offer, than look no further! You can bet this course will keep your HR high, while you take in the surrounding mountain views and terrain.


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Trail Running is not just for adults...

The ERS is excited to offer our very popular "Kid's Dash". These races are geared towards kids 10 years and younger, and will measure about 1/4 mile in distance.

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What is Cupless Racing?

The ERS will provide the aid stations on course with water and electrolytes. The runner will be responsible for providing their own hydration vest, bottle, or reusable cup to use at those 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. 

Potential Expo Venders click on the link below. Potential sponsors reach out to us HERE



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

Services include but not limited too: Race Management, Announcing, Medal and Shirt Design. 

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

- Mandi R.

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3220 Erie Parkway

Erie, CO 80516


4061 Oceanside Blvd, Ste N

Oceanside, CA 92056

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