“Somewhere over the rainbow, way up high, are the dreams that you dream of…”
– Isreal Kamakawiwo’ole

Come join us on the Rainbow Trail in the Sangre de Cristo mountains. Run beneath the watchful eye of these gorgeous, and ominous, mountains. You may even think to yourself, ‘what a wonderful world’. This race is full of festivities, friends, challenge, and joy. Camp out with the HPRS tribe, whichever distance you choose you’ll wander through the Southern Colorado Rocky Mountains, and embrace the feeling of the wilderness within. This unique race is about community, it is about traveling together, it is about discovering the hidden treasures in the mountains and those within yourself.


Date: September 22, 2018
Distances: 100k  |  50-miles  |  50k
Average Elevation: 9,944′  |  9,570′  |  9,675′
Gain/Loss: +14,714’ / -14,714′  |  +11,233′ / -11,233′  |  +6,896′ / -6,896′

Start Time: 6:00 AM for all races
Time Limit: 24 Hours for 100k & 50-miles, 16 Hours for the 50k
Location: Westcliffe, CO

COMING IN 2019!: 100-Mile Option
COMING IN 2020!: 200-mile Option dependent on event popularity


March 1, 2018 – June 30, 2018:

July 1, 2018 – September 18, 2018: $140
Race Day: $160 CASH ONLY (No Shirts, & Awards by limited availability only)

March 1, 2018 – June 30, 2018: $100
July 1, 2018 – September 18, 2018: $120
Race Day: $140 CASH ONLY (No Shirts, & Awards by limited availability only)

March 1, 2018 – June 30, 2018: $80
July 1, 2018 – September 18, 2018: $100
Race Day: $120 CASH ONLY (No Shirts, & Awards by limited availability only)

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

Those registering after Monday, September 10, 2018 will not receive a race shirt, and awards only as available (limited)
Online Registration closes September 18, 2018 at 11:59pm

CAMPOUT! As a part of our permit with the USFS San Carlos Ranger District, we’ve been given permission to host a “camporee” at the start/finish line. We have limited space for TENT CAMPING ONLY. Tents only in order to help minimize our impact on the resource. Camping with us in included in your entry fee, and we encourage you to be a part of this amazing tribe, and immerse yourself, on this weekend. 



UTMB/ITRA: This race has been evaluated and certified by the International TrailRunning Association. The 100k and the 50-Mile are UTMB Qualifiers each worth 4 Points, while the 50k is a UTMB Qualifier worth 2 Points.

Course: The course is an out-and-back that begins and ends at The Grape Creek Trailhead on United States Forest Service land at the terminus of Custer County Road 119 located south of Westcliffe, CO. Runners will negotiate the Rainbow Trail, and Hermit Pass Road, within the San Isabel National Forest/San Carlos Ranger District. Runners will negotiate these trails and roads at elevations between 9,000 and 13,500′. On this section of the Rainbow Trail, the trail is just wide enough for ATVs to travel on. It is not a double track trail or road, not quite single track. The trail is rugged and remote and serves as the boundary of the Wilderness Area along it’s entire western flank.

Aid Stations: Runners in the 100k will access 4 aid locations with a total of 8 stops. Runners in the 50-mile will access 4 aid locations with a total of 7 stops. Runners in the 50k will access 2 aid locations with a total of 3 stops. Each aid station will be fully stocked with water, electrolyte drink, and assorted “Ultra” snacks. Aid station cut-offs have been set against the slowest possible pace possible to successfully finish the event. Therefore, the cut-offs in this first year are strict. 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 two (2) locations in the 100k and 50-mile. We are not allowing crew access for 50k runners. Crews can tend to their runners four (4) times on the course between these two stations.

Pacers are allowed to join runners in the 100k only, and at the following aid station only: Horn Creek 2 at Mile 47

Parking: We respectfully ask all runners to please carpool to the race in order to minimize our impact on the land we use. All runners must park at the designated parking locations ONLY. Crews will be parked by volunteers at designated crew stops, and all crews must follow the direction of parking attendants.PLEASE ONLY PARK IN DESIGNATED AREAS AND PLEASE NO SPECTATORS. 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 6-7pm at the Start/Finish on Friday Night;  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: Friday Evening at 7pm at the Start/Finish

Post-Race Celebration: There will be a post race gathering at The Grape Creek Trailhead. We’ll welcome all of our runners to the finish line with food and drink. See your runner’s manual for details.

Awards: All official finishers will receive a unique finishers award. We’ll also present special awards to DFL and Best Blood.


Permits: This event is being held in accordance with permits from the U.S. Forest Service, San Isabel National Forest – San Carlos Ranger District. 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.