ERS events facebook page

In 2012, The Endurance Race Series (ERS) was founded with the intent on creating an event production brand in the trail running category, starting with 3 events. Since we started, the Endurance Race Series has not only created a trail running brand for itself, but it has also helped build its own trail running community within Colorado and California (San Diego). 

Today the ERS is widely considered to be Colorado's Largest Trail Race Series, and San Diego's fastest growing trail running races. With a total of 15 events combined in the 2 regions, the ERS hosts more than 6000 beginner or experienced trail runners each year. 

Whether you are looking for a stroll along the water, some scenic single track, or a challenging hill or mountain course, the ERS prides itself on offering trail runners the BEST race experience and atmosphere in the industry. 

Every event within the ERS, offers multiple race distance options, great course support, kid's races, and finish line festivals that the entire family can enjoy with music, food, games, raffles, and plenty of beer (for those over 21 years, of course). 

It is the mission of the Endurance Race Series to provide competitive, quality events to the runners in the trail running community, while providing an entertaining, relaxing, family friendly atmosphere to those spectators and sponsors in attendance.​

Trail running races are not just for adults...  

The Endurance Race Series is excited to offer our very popular "Kids Dash" presented by BUILT w/ Chocolate Milk for all kids 10 years and under.  The "Kid's Dash" is available at each of our races and will normally be measured out between a quarter mile and a half mile depending on the ages of the kids that are participating. 

Kids registration is $10 and available onsite, race day only, and includes a kids medal. ​

27 June 2018

ERS announces first MILES CHALLENGE. This free event will run though the month of July allowing runners to win prizes for the total amount of miles run. 


The Endurance Race Series believes the finish line festival plays as big a part in the race experience as the run itself, so we always try and provide our runners and spectators with as much entertainment, food, and beer as possible at each and every race. Whether its a post-race wine tasting, Pancake Breakfast, or just good old fashioned expo with sponsor demos, music and games, our festivals are family friendly and keep the party going all morning long. 

If you are a company looking to join us as an expo vendor at any or all of our events you can find our expo application HERE, or email us and we are happy to answer any of you questions. 

ERS Kid's Dash  

20 February 2018

ERS announces Snow Mtn Ranch event will host 2 day trail running festival, will add 50K to  weekend event schedule


  • All Race course are subject to change at any time leading up to the race date due to circumstances beyond the ERS' control. This also includes race dates, race times, and trails used.
  • Although we would like to get race courses to their exact and respectful distances, sometimes this may not be possible, and courses may measure longer or shorter than indicated. GPS between products will also always vary.
  • Aid Stations will include First Aid, Water, Electrolyte, and Nutrition
  • It is the responsibility of the runner to know the course. We mark the course to the best of our ability with directional signs, mile markers, flour, and volunteers. We are not responsible for course sabotage and non-race personnel misdirecting runners, nor are we responsible for any runner deciding to follow other runners in the wrong direction, knowing it is incorrect. If and when race courses are changed, or updated we will post updated course maps online and onsite, race morning.

For additional information and answers to FAQ's regarding this same subject matter please click HERE

Finish Line Festivities 

Overall Series Info- "The Need to Knows"

29 March 2018 

ERS welcome's Balega Socks as the Official Sock Sponsor. The addition of Balega for the CO events makes them an overall ERS sponsor in both series locations



Westen Dairy Association

About the Endurance Race Series