New in 2018:
Colorado Races Only
"I bought the 10k Season Pass as a way to support my fitness goals. I am achieving that and along the way, with each race, i see friendly, supportive, joyful people who motivate me with their positive energy. This is a consistently, extraordinary experience that i am recommending to everyone i know. You ROCK Endurance Race Series"
Welcome to the Endurance Race Series, home to 15 total trail races in Colorado and California.
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, great mountain views, with a family friendly atmosphere, and fun post race celebration!!
All ERS Races Meet ATRA Event Standards
2018 Colorado "Summer Series" Promo Video
All Colorado trail running races are considered to be a part of our Summer Series, while our Southern California 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"
Copyright 2017. Endurance Race Series, LLC. All Rights Reserved.