North Fork Ultras
Soft singletrack through ponderosa pines and towering granite in the mountains just southwest of Denver.
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Where & when
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Photos: Liberty Pro Imaging
About this event
The North Fork 50 Mile and 50K is a gem of an ultramarathon in the Colorado mountains just southwest of Denver. The course is 100% soft surface, almost entirely incredible singletrack with a few short sections of double track road. Climb through open burn areas from the 1996 fire, then dive back into the ponderosa pines and wind around towering granite rock formations.
The 50 Mile starts at 6:00 AM and the 50K at 7:00 AM from the Buffalo Creek clubhouse. Aid stations include Colorado Trail (water only), Kelsey Campground, Shinglemill, Tramway, Buffalo, Rolling Creek and Homestead, and crews can meet runners at Buffalo aid.
A portion of race proceeds goes to the North Fork Volunteer Fire Department, which supports and serves the local community.
What's included
- 50 Mile and 50K on 100% soft surface, almost all singletrack
- 50 Mile: about 6,425 feet of climbing, 14 hour limit
- Ponderosa pines, granite formations and the 1996 burn area
- Crew access at Buffalo aid station
- A portion of proceeds supports the North Fork Volunteer Fire Department
Ask about this race
Start times, cutoffs, aid stations, shirts, refunds. Answers come from this race's own details.
View full policy
- Withdraw
- 75% race credit through Apr 22, then 50% race credit (injury, illness or family emergency) through May 17, then nothing back. Credit is good for 12 months. Credit you used on this entry isn't re-issued.
- Pregnancy
- Withdraw any time before race day for 100% race credit, good for 24 months.
- Transfer
- Not allowed.
- Defer
- Not offered.
- Change distance
- Yourself, from your registration. Moving up pays the difference.
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