North Fork Trail Race

Registration is open on UltraSignup.  As of March 15, the entry fees are $105 for 50K and $115 for 50 Miles.  Click on the Registration tab above to get more details about registration.

​For complete information on the 2017 race, the course, and past results and course records, look under the Race Info tab above.  And here is a pdf version of the race info that you can print:


Printable copies of the course map, turn sheets, elevation profiles, aid station table and crew directions and maps are on the Course page under the Race Info tab above.



It takes a small army of volunteers to make this race happen for the runners and our beneficiaries.  Runners, hikers or bikers are needed for course marking the day before the race.  On race day, volunteers are needed to help at our five aid stations, as course monitors to keep the runners on track, and for lots of various duties at the race start/finish in Pine Valley Ranch Park.  Take a look at the Volunteer page for more details.  If you'd like to help for all or part of the day, any time from 5:30 a.m. to 9:30 p.m., just email the race director at .


There will be two informal training runs on the course for registered runners and volunteers only, each of whom may bring one guest for whom they are responsible.   May 6 (changed from April 29) at 7:30 a.m. will be a "distance fest" from the Meadows aid station location, in which runners can choose their distance of 12 to 27.6 miles with routes on both the 50K and 50 Mile courses.  May 20 at 8:00 a.m. will be 22 miles (with option to add a few more miles) from Pine Valley, including the first 14.7 and the last 7.7 miles of the course (both distances). Email to sign up. Here are the maps and turn sheets:

Can't make it to a training run?  No problem.  Come up to the course whenever you can and use these maps and turn sheets to navigate your own training run.​​

Current News

THANK YOU to our sponsor Avery Brewing, who provides the great Avery beer for our post-race barbecue!  And to Succeed for providing S! Caps for our aid stations.  And to Runners Roost for our bib numbers and start/finish banners.

The 50 Mile and 50K are 100% trails, mostly single track and some double, in the beautiful Buffalo Creek Recreation Area in the Pike National Forest, starting and finishing along the rushing North Fork of the South Platte River in Pine Valley Ranch Park in Pine, Colorado.  The elevation ranges from 6,700 feet to 8,100 feet in the 50K and to 8,400 feet in the 50 Mile.  With 4,800 feet of climb in the 50K and 7,500 feet of climb in the 50 Mile, the race is very challenging for those not used to mountain trail races, yet speedsters who are used to altitude will find the course quite runable.

The race benefits the North Fork Volunteer Fire Department, which protects the area where the race is run.  They have helped to battle a number of wildfires in the area over the years that have changed the landscape, opening broad vistas of the high country and making way for new growth.  You will run through some of the burn areas, but most of the course is in pristine pine and aspen forest.  The beautiful scenery, friendly aid stations and generous time cutoffs make North Fork an excellent choice for first-time ultramarathoners as well as veterans.  Runners get high quality tech T-shirts, unique finisher awards, a fabulous post-race barbecue and the satisfaction of a job well done.

Part of the proceeds are also donated to StageDoor Theatre in Conifer, which brings great entertainment to the local community and provides theater education and opportunity to area youth.  StageDoor volunteers will be presenting the barbecue on race day.

Check out the photo galleries on the Photos page.  And all the course and race information can be found under the Race Info tab above.  If you have questions, feel free to email the race director at or call 303-903-3533.

In the Mountains
Just 40 Miles
Southwest of Denver

The Race

50 Mile/50K June 3, 2017, 7:00 a.m. - Pine, Colorado