North Fork 50 Mile

Buffalo Creek, United States • 30 May 2026

North Fork 50 Mile / 50K : Buffalo Creek, Colorado

North Fork 50 is a trail ultramarathon held in the Buffalo Creek Recreation Area in the Pike National Forest, roughly 50 miles southwest of Denver. The event offers two primary distances:

  • 50 Mile
  • 50K (31.1 miles)

Both courses are 100% soft surface and consist mostly of singletrack with a few short double-track road sections. The route passes through ponderosa pine forest, open burn areas from the 1996 Buffalo Creek fire, and near notable granite rock formations. The 50K is a single-loop course. Key course statistics: the 50 Mile route lists about 6,425 feet of total climb and a maximum elevation near 8,535 feet; the 50K lists about 3,670 feet of climb and a maximum elevation near 8,150 feet.

Aid stations are placed along the courses and offer water and food at many locations; one early station is water only. Some aid stations allow crew access and drop bags, while others have limited or no parking. The course is marked with orange-and-black polka-dot ribbons and orange pin flags; blue-and-white checkered ribbons indicate the wrong way. All finishers completing their registered distance receive a commemorative award, and special awards are given to the top three men and women in each distance. A portion of race proceeds benefits the North Fork Volunteer Fire Department, with additional beneficiaries listed for the event. Visit the organization's website for the most recent information.

Race information

50 mi
50 Mile
50 km
50k
Visit the organization's website for the most recent information.
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