North Fork Trail Race

Photo by Derya Senol.

The race is now full and there is no wait list. A list of entrants can be viewed on UltraSignup.  See the Registration page for details on registration policies.

RUNNERS:  Please review all the race and course information under the Race Info tab above.  If you have a crew, be sure to print out the crew instructions and map for them.  

VOLUNTEERS:  We still need lots of help on race day!  We need people at the aid stations as well as at Pine Valley.  We also need course monitors to direct runners.  It all starts at 5:30 a.m. with pre-race check-in and goes until 9:30 p.m. when we pack up after the last runner arrives.  Please email if you'd like to help.

TRAINING RUNS:  ‚ÄčThere will be 2 training runs on the course for registered runners, each of whom may bring one guest.  The dates are Saturday April 23 and Saturday May 14.  (We are sorry we had to cancel the run previously scheduled for May 1--we are leaving the 18-mile turn sheet and map here so you can run this route yourself.)  Details are in the instructions for each run below.  We can have up to 30 runners at each run.  Email if you would like to participate.

Can't make it to a training run?  Use the maps and turn sheets to do your own training run whenever you like.  April 23 and May 14 will give you the whole 50K.  The 18-mile run is extension for the 50 Mile.


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 runnable.

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 in recent 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 Races 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 4, 2016, 7:00 a.m. - Pine, Colorado