Become a Season Pass Holder


Our very popular "PICK 6" is great for those runners that want to run multiple events with the ERS, but don't have the schedule to join us in a Season Pass.

How it works:

  • Choose any 6 events you want...
    • All Colorado or a mix of Colorado and California races
  • Choose a Race Distance for each event
  • Receive an automatic 25% off your total registration at check out
  • Receive 1 Confirmation number
  • Automatically signed up for each event you chose, no additional paperwork 

"Pick 6 " prices may vary based on which races and distances you choose to participate in.


  1. We do offer a Shirt and "No Shirt" registration option when registering for any of our events​.
    • ALL pre-registered runners will receive a gender specific T-shirt upon packet pickup. When registering for your event online you will have the opportunity to select the correct shirt size. (If you choose the shirt option)
  2. Important- Only those people that PRE-register for an event and select the shirt option will be guaranteed to receive a T-Shirt with their registration, while ALL packet pickup and race day registrations will be asked to wait until they have finished the designated event to pick up their race shirt.
    • Please note, that race day registrants will not be guaranteed the correct size shirt if any at all. Thank you for understanding this policy, as we want to make sure those runners that register early do receive the shirt they requested.   We order our shirts about 10 days out from the respective event, so it is our recommendation that you complete online registration no later than that time frame to be guaranteed a shirt of your choosing.
  3. ALL FINISHERS, regardless of distance will receive a medal.

If you register for a specific race distance and need to upgrade or downgrade, you may do so by contacting our staff before the registered event. 

  • $30 Upgrade Fee is required for 10k to Half
  • $15 Upgrade fee is required for 5k to 10k, or 10k to 15k (where applicable)
  • No refunds will be given for downgrading

Thank you for choosing to participate with the Endurance Race Series.  We know there are many events out there to choose from, so your participation is much appreciated. 

We are excited to offer a number of registration options for each of our events and both our series. Runners can choose between the following registration options:

  • Individual Race Registration- Enter into each event seperately
  • Pick 6- Register for ANY 6 events at once and receive an automatic 25% off you registration at check out.
  • Season Pass- The VIP package! Sign Up for all Races at once for 1 low price.

​*Additional Information on our "Pick 6" and Season Pass Options can be found below.  

​**Special Registration Rules/Notes can be found below at the bottom of the page. ​​


The Endurance Race Series is excited to bring back our very popular SEASON PASS registration to the 2018-2019 trail running seasons, but with some new options...

  • ​Colorado Season Pass- Available Now
    • ​​All 10 Colorado Races
    • ​Current Prices: $500 (Half Marathon), $275 (10K)
  • ​Ultimate Season Pass (California and Colorado)​​​- Available January 2018
    • Choose any 10 total races between the CO and CA events
  • ​Sunshine Season Pass- Available April 2018​​
    • All 5 California Races

The ERS Season Pass, regardless of which option you choose,  is considered our VIP experience.  Register one time, and be automatically entered into each race, with no further action. The Season Pass includes:

  • Available for both Half Marathon and 10K distances (Colorado)
  • 1 Time Registration at a discounted rate​, automatically added into each race's database
  • VIP Goodie Bag, featuring ERS and Sponsor items
  • Special Season Pass Event Shirt for each race (shirts provided at race pickup)
  • Dedicated Packet Pickup Line on Race Day (Skip the lines, get your gear quickly!)

Finish ALL Races that you are registered for and receive our "SEASON PASS AWARD" AND "MEDAL" at the conclusion of your last event

"Pick 6" Registration 

Registration Rules/ Notes: 

Registration Information

ERS events facebook page