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The 50 Mile and 50K are 100% dirt, mostly single track trail and some double track and dirt road, in the beautiful Buffalo Creek Recreation Area in the Pike National Forest, starting and finishing along lovely Buffalo Creek at the Community Hall in Buffalo Creek, Colorado. This is a new start and a new course! Be sure to review all the race info.  The Community Hall belongs to the Buffalo Park Improvement Association (BPIA or, as the locals call it, "Bippy")--so our start/finish is nicknamed Bippy. The elevation ranges from 6,700 feet to 8,100 feet in the 50K and to just over 8,500 feet in the 50 Mile.  With 3,800 feet of climb in the 50K and 6,600 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 and for whom the race is named.  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.

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 50 Miles
Southwest of Denver

The Race

50 Mile/50K June 1, 2019, 7:00 a.m. - Buffalo Creek, Colorado

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.  And to the Park County Radio Club who will be providing communications among our aid stations and Bippy.


275 total entries have been accepted for both distances combined.  There is NO WAIT LIST.  Entries are NON-REFUNDABLE and NON-TRANSFERABLE and CANNOT BE ROLLED TO A FUTURE YEAR.  See the Registration page on this site for details of this policy.

We need volunteers!  Especially early on race morning for parking and check-in at 5:15 a.m.  We also have some aid stations who need help, and the finish line always needs help.  If you'd like to volunteer, just email to work out details.

Important for Runners:  Please, please carpool!  Parking in the field at Bippy will be a bit of an adventure--we've never done it before.  We expect all the cars to fit, but it could be tight.  Please help by carpooling. ​

Runners, please email if you will not be able to run on race day.  Knowing who will actually be there helps so much for race planning.  And we can take you off the UltraSignup entrants' list so you won't get a DNS on your record.

If you are running, do review all the race info on this website.  You are responsible for knowing this information.

Map of parking and start/finish area

North Fork Trail Race