& Mine Shaft Half

The Tommyknocker Ultras is a challenging 12-Hour timed event with spectacular views of Colorado’s Front Range above the Denver Metro Area. The course features double-track and single-track trails with 0.0% pavement. The Mine Shaft Half features a mountain of an out and back course.

If you run one race this year, make it Tommyknocker. The Tommyknocker 12-hour event is part race, part carnival and ALL fun. Set in the foothills near Golden, the course is designed by you (in a lottery-style drawing) in a series of loops. The key question is: Which loops will you run during your 12 hour jaunt? And will you have more fun running or playing at the aid station? Come find out.

Race Overview

Date: May 20, 2017
Distances: How ever far you can run, on multiple loops, in 12-Hours. Or enjoy our trail Half Marathon.
Start Time: 6:00 am
Elevation Gain/Loss: ??Up To Luck??
Time Limit: 12 Hours
Location: White Ranch Open Space in Golden, CO


Entry Fees:

12 Hour – Solo Division:

December 1 – December 3: $75.00
December 4 – February 28: $85.00
March 1 – May 20: $95.00

12-Hour – Relay Division:
Team Captain will pay price in full

December 1 – December 3: $140.00
December 4 – February 28: $175.00
March 1 – May 20: $200.00

Mine Shaft Half:

December 1 – December 3: $45.00
December 4 – February 28: $60.00
March 1 – May 20: $70.00

HPRS Members Enjoy 10% Off Registration Fees!

Those registering after Monday May 8, 2017 will/may NOT receive a race shirt and finishers award.
Registration closes May 17, 2017 at 11:59pm


Course Details:

Course: After running from the race’s start location to the upper White Ranch Parking Lot, runners will dive their fists into a bucket full of colored balls. These colored balls will be colored Red, Green, Orange, and Yellow. The color the runner pulls will indicate which loop they will now run.

Each loop will be marked with flagging tape the same color as the ball pulled (Green Ball follows Green Markings, Red Ball follows Red Markings, etc). After completing the selected loop, their miles will be recorded, and a new ball will be selected by the runner. This repeats for nearly 12 hours.

No two runners will run the same exact course. It’s the luck of the draw and how tenacious one can be in order to run as many miles as they can in this 12-Hour Carnival. Runners are guaranteed 14.5 miles totaled on the approach to the upper lot and the return run back to the bottom at the end of the race. Runners MUST return to the bottom lot prior to the 12-hour cut-off in order for their miles to count. Late runners will receive a ZERO for the event.

Mine Shaft Half: For those who don’t want to run in circles for 12-hours, but would still like to join us for a day on the trails; The Mine Shaft Half is for you. You’ll run the same route (Purgatory) as the 12-Hour runners to the main aid station. From there you’ll run the green loop before descending Purgatory to the bottom lot. The half marathon features 3,786′ of elevation gain and 3,786′ of elevation loss.

Click For: Event Map
Click For: Elevation Profiles/Event Layout

Aid Stations: There will be one main aid station set up for the event. This aid station will be located in the Upper Parking Lot to White Ranch Open Space. Runners will check in and out of this aid station at the beginning and end of each loop. The aid station will be fully stocked with water, electrolyte drink, and assorted “Ultra” snacks. It will also have drop bag access.

CREWS AND PACERS: Due to limited parking in the area, crew access is limited. We ask crews to carpool together so long as parking spaces in the upper lots allow. Crews may ONLY access their runner at the Main Aid Station. HPRS Staff and Volunteers will be able to provide you with everything you’ll need for this event. Please consider coming without a crew!

No Pacers Allowed

Parking: All runners and spectators must park at the designated parking locations ONLY. We ask that you NOT park at White Ranch Open Space if you can avoid it. We need to leave the parking lots open to other trail users. 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 4:30-5:45am in the lower lot of White Ranch; We’ll also have pre-race day packet pick-ups at various local running retailers. All runners must check-in with race staff the morning of the run by 5:45AM. Runners not checked in by 5:45 AM will not be scored as official runners of the event.

Pre-Race Briefing: Saturday Morning at 5:30am at in the White Ranch Lower Lot.

Post-Race Celebration: There will be a post race gathering TBA.

Awards: All official finishers will receive a unique finishers award. 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 Jefferson County Open Space and Mountain Parks. 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.

Join us and challenge yourself, discover your Human Potential!