Sunday, June 10, 2018 – Fairplay, CO
Saturday, June 23, 2018 – Fairplay, CO
Thursday, July 5, 2018 – Fairplay, CO
Sunday, August 5, 2018 – Fairplay, CO

Click on a date above to register today!

Additional Opportunities with Jefferson County OSMP

Don’t want to head to Fairplay to get trail work done? Consider joining our friends at JeffCo OSMP! A list of their upcoming volunteer days are listed on Eventbrite by clicking HERE.


The Human Potential Running Series is proud to announce that we have officially become the first ultra (and/or series) in Colorado to adopt trails from the United States Forest Service. We have done this to continue on our mission of not only building a better ultra community for our runners, but to improve the relationships between ultra running and the land managers we work with.

In cooperation with the United States Forest Service – Pike National Forest South Park Ranger District; we have adopted 11 miles of trail in the South Park Valley. The 11 miles we’ve adopted is made up of 4 different segments of trail. Three of those segments are routes we use for our Silverheels 100-Mile Endurance Run held annually in August. The fourth segment is part of the Sheep Mountain 50-Mile Endurance Run held annually in July.

There is no doubting that our events, and other events like it, put various types and levels of strain on the resources we utilize. Human Potential believes that it is imperative we give back to better conserve these resources for other trail users, and future generations of trail users.

Many races have started to require their participants complete at least 8-hours of volunteer trail work prior to running in their event. The Human Potential Running Series requires 8-hours of volunteer trail work for those to be able to participate in the Silverheels 100-Mile Endurance Run (Though, runners can opt out of this requirement by submitting a $150 donation to the South Park Schools Foundation).

Due to the growing number of races requiring volunteer trail work, as well as our own requirements, HPRS is also proud to adopt these trails to better serve the Colorado ultrarunning community in fulfilling these requirements. Every year, HPRS will be releasing a trail work schedule to allow folks to plan which workdays they’d like to attend between the months of June and October.