New in 2018:
- Bib Tagged Timing Only, no Chips
- Race Shirt Optional Registration
- Next Level Cotton/Poly or Tri-Blend Race Shirts. No Tech tees
- Trail Running Festival @ Snow Mtn Ranch (including new 50K option)
- New Courses (CO) for the Westminster, Eagle, Mountain Ridge, Beaver Creek, and Snow Mountain Ranch events
- New Course (SD) for Black Mountain event
2018 San Diego "Sunshine Series" Promo Video
- San Deigo Events- "The Sunshine Series"
- Carmel Valley Trail 15K, 10K, 5K October 13, 2018
- Black Mountain Half Marathon and 10K November 24, 2018
- Del Dios Trail Half Marathon, 10K, 5K December 9, 2018
- San Pasqual Valley Half Marathon and 10K February 16, 2019
- Coast to Crest 10K and 5K March 9, 2019
Colorado Trail Race Schedule
I have been racing for 30 plus years, and know the making of a good and enjoyable race for all - whatever kind it might be. The ERS is well organized, and puts on a good race, have beautiful surroundings, well positioned aid stations, photo opps, food, and announcing.
Pam G.
#ERSevents
Welcome to the Endurance Race Series, home to 15 total trail races in Colorado and California (San Diego).
Whether you are a competitive trail racer, an avid runner, or a trail beginner, our races have what you are looking for...
Challenging, yet beginner friendly race courses, spectacular views, with a family friendly atmosphere, and fun post race celebration!!
Oh... and FREE race photos!
All ERS Races Meet ATRA Event Standards
2018 Colorado "Summer Series" Promo Video
What Runners Say About Us
All Colorado trail running races are considered to be a part of our Summer Series, while our San Diego races are defined as our Winter, or "Sunshine Series".
"The Endurance Race Series events are the best ones out there! The events are incredibly organized, family friendly, super fun, and the course are phenomenal"
Jackie B.
- Colorado Events- "The Summer Series"
- Westminster Trail Half, 10K, 5K Completed 2018
- Palmer Lake Half and 10K June 2, 2018
- Eagle Half and 10K June 16, 2018
- Mountain Ridge Half Marathon/10K June 23, 2018
- Black Hawk Half Marathon and 10K July 22, 2018
- Beaver Creek Half, 10K, 5K August 5, 2018
- Roger's Grove Half Marathon and 10K August 26, 2018
- Denver Trail Half and 10K September 8, 2018
- Snow Mtn Ranch Trail Running Festival September 22-23, 2018
- Louisville Trail Half, 10K, 5K October 7, 2018