Join the ERS as we head to Barr Lake State Park in Brighton, CO for some beautiful lake views and new PR's.

The course is our flattest and fastest on the ERS Summer Series schedule with less than 100' of elevation gain for either course. Runners will start and finish at the Nature Center and make their way around the lake that features views of the lake and the front range the entire way. 

The 15K is technically a new race course option in 2021. It is a complete loop round the the lake, while the half marathon is a "lollipop" , out-and-back course. 

The ERS is 100% Cupless Racing, meaning we supply the aid stations, while the runner supplies their own bottle, hydration pack, or reusable cup. Please plan accordingly.

PLEASE NOTE:  State Park parking fees have been included in your registration fee

Due to continued Covid guidelines, restrictions on participation numbers may apply. We will know more about those limitations in January 2021, when the State Park releases its special event permits and guidelines.

What we know currently...

  • All ERS races in 2021 will be planned as a staggered start for each race category
  • Race waves will be set at 25 runners/ wave with a planned increase based on permit guidelines
  • Race Waves will be separated by 5 min
  • We plan to offer a pre-packaged food bag at the conclusion of the event. Which runners will have the option to take for free. All items within these bags will be pre- packaged snack items.
  • Medals will be individually wrapped (when applicable) 
  • Hosting an awards ceremony in the finish line area will be based on current local guidelines at each event

Race Day Schedule

7:00amHalf Marathon Starts

8:30am15K Starts

Suggested Amounts


Location Information

  • Barr Lake State Park
  • 13401 Picadily Rd, Brighton, CO, 80603 US

LIABILITY WAIVER AND RACE AGREEMENT: I know that running or walking a road race is a potentially hazardous activity. I will not enter and run unless I am medically able to do so and properly trained. I assume all risks associated with running or walking this event, including but not limited to the effects of weather, traffic, course conditions. I understand that The Endurance Race Series, the sponsors, the volunteers, and all others assisting in the operations of the event and its supporting and related activities assume no responsibility or liability with respect to my participation in the run or in any related events. Having read this waiver, and knowing these facts, and in consideration of the acceptance of my entry, I for myself and any person entitled to act on my behalf do hereby release the Endurance Race Series, all sponsors, volunteers, together with their employees, contractors, subcontractors, even though liability may arise from negligence or carelessness on the part of persons or organizations named in this waiver and release.
Prior to attending any event each runner must self-screen and stay at home if sick or exhibiting symptoms of Covid-19, or if they or someone they live with have been diagnosed with Covid-19

Maintain physical distancing of at least 6ft whenever possible

All Runners must wear a facemask or face covering before the run in the start area and after the run if socializing in finish areas. Face masks will not be required while on the course.

Please run at your own risk! Each participant acknowledges that Covid-19 is a global pandemic and that infections have been confirmed throughout the US. Each participant understands that the Endurance Race Series cannot guarantee safety or immunity from infection. Each participant understands the uncertainty of the virus, how it may impact their health, and voluntarily assumes all risks associated directly or indirectly with participating in any Endurance Race Series activity. Each participant knowingly and voluntarily waives and releases Endurance Race Series, its staff, volunteers, and sponsors from any and all future claims of any type, including for any harm or loss, personal injury, disease or death. Each participant agrees not to sue Endurance Race Series for any personal injury, death, medical expenses, disability, court costs, attorney fees, and/or other loss

Billing Information

  • Visa
  • Mastercard
  • American Express
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