“There, is where I’ll dig a mine to my soul.” 

The Grand-Daddy of all the Human Potential Running Series Races, The Silverheels 100-Mile Endurance Run. Running at an average elevation of 11,000’ will have you thinking you’re hallucinating how beautiful this course is. Silverheels is second, only to The Hardrock 100, in average elevation across the 100-mile course. Bring everything you’ve got in you to tackle this monster of a course, because you will be challenged. Look for abandoned gold mines, awe at the wildflowers in full bloom, and dance under the watchful eye of Silverheels Mountain herself. The person who finishes this race, will not be the same person who started it. To complete this journey, one must grow, and overcome. #Adversity must become your friend. Finishers celebrate the journey, memories, and achy hips with the coveted Silverheels Buckle!

“If you can talk with crowds and keep your virtue,
Or walk with Kings—nor lose the common touch,
If neither foes nor loving friends can hurt you,
If all men count with you, but none too much;
If you can fill the unforgiving minute
With sixty seconds’ worth of distance run,
Yours is the Earth and everything that’s in it,
And—which is more—you’ll be a [Silverheels finisher], my son!”
– Rudyard Kipling


Date: July 7-8, 2018
Distances: 104 Miles
Average Elevation: 10,900′
Gain/Loss: +18,170’ / -18,170’
Start Time: 4:00 AM
Time Limit: 36 Hours
Location: Fairplay, CO

Check out our 50-Mile Option! CLICK HERE


December 1, 2017 – December 3, 2017: $175
December 4, 2017 – February 28, 2018: $200 $175!
March 1, 2018 – June 30, 2018: $225
Race Day: $240 CASH ONLY (No Shirts, & Awards by limited availability only)

HPRS Members Enjoy a minimum of 10% Off Registration Fees!

Those registering after Monday, June 25, 2018 will not receive a race shirt, and awards only as available (limited)
Online Registration closes June 30, 2018 at 11:59pm


Entrants must be at least 18 years old

Runner Volunteer Requirement: All registered runners must complete 8 hours of Volunteer Trail Work with a recognized organization, or 8 hours of Volunteer Work at any other Ultramarathon. The volunteer requirement must be completed between July 4, 2017 and June 4, 2018. You may download the Volunteer Service Requirement Form via the link below.

Volunteer Service Requirement Form 

If you wish to by-pass this requirement, you have an opportunity to do so by writing a check for $100 to “South Park Schools Foundation” and mail that check to:

Human Potential LLC
6197 Castlegate Drive W Apt 2227
Castle Rock, CO 80108


UTMB/ITRA, WS100, HR100: This race has been evaluated and certified by the International TrailRunning Association. It is a UTMB Qualifier worth 6 Points. To learn more about why Silverheels is a qualifier for UTMB but not the Western States or Hardrock 100s, please CLICK HERE.

Link: Comparing Silverheels to other United States 100s

Course: The course begins and ends at Cohen Park located in Fairplay, CO. Runners will negotiate Dirt and Gravel Roads, Single track trail, and remote trails of the Pike National Forest/South Park Ranger District. Runners will negotiate these trails and roads at elevations between 9,000 and 12,500′. This is the 2nd highest 100-miler in North America!

Aid Stations: Runners will access 9 aid locations with a total of 22 stops. Each aid station will be fully stocked with water, electrolyte drink, and assorted “Ultra” snacks. There are a few stations that are water only. Aid station cut-offs have been made based on historical information of SH100 Finishers, the latest time anyone has ever left a station and finished with some wiggle room. Please see our Aid Stations chart for more details.

Crews and Pacers: Due to access difficulty in the area, there will be crew access at ONLY Five (5) aid station locations. Crews can tend to their runners nine (9) times on the course between these five stations. Note: Two of these crew accessible spots are hike in only. Please plan accordingly.

Pacers are allowed to join their runners at the following aid stations only: Miles 56.5, 65.5, 81

Parking: All runners and spectators must park at the designated parking locations ONLY. We ask that you NOT park on Main Street, Front Street or 4th Street in Fairplay. PLEASE ONLY PARK IN DESIGNATED AREAS. A map of these areas will be available closer to the race.

Pre-Race Check in: Packet and bib number Pick-Up will take place from 6-8pm at Fairplay Town Hall on Friday Night;  All runners must check-in with race staff the morning of the run by 3:45AM. Runners not checked in by 3:45 AM will not be scored as official runners of the event.

Pre-Race Briefing: Friday Evening at 7pm. Location TBA

Post-Race Celebration: There will be a post race gathering at Cohen Park. We’ll welcome all of our runners to the finish line with food and drink.

Awards: All official finishers will receive a Silverheels 100 Belt Buckle. We’ll also present special awards to DFL, Best Blood and a few surprise awards as well.


Permits: This event is being held in accordance with permits from the U.S. Forest Service, Pike National Forest – South Park Ranger District, Park County, The City of Fairplay, and permission from our local private land owners. We ask that you please respect and care for the land this event is held on to help ensure the future of this race and to limit our environmental impact.

Any additional race information, changes, and updates will be sent to registered entrants ONLY via e-mail communication.

PLEASE NOTE: The Silverheels 100-Mile Endurance Run takes place in a delicate mountain environment. The route utilizes a variety of properties owned and/or managed by Park County, The Town of Fairplay, The United States Forest Service, and numerous Private Land Owners. All of these relationships, especially those with private land owners, are also delicate in nature. Simply put, it is not our right to hold this race, it is a privilege. While we welcome and encourage you to train on the course, we ask that you please be careful to only utilize the course via the route which has been fully approved by all parties. NEVER travel onto private property and be respectful of all private lands. Leave it better than you found it and above all else, leave no trace, take only pictures. Those who so choose to use unapproved private lands will be swiftly banned from any and all HPRS events for LIFE.