Races
Flagstaff Extreme Big Pine 50K
Flagstaff Extreme summer 50K. Pine forest vert when Phoenix is baking.
50K+16,316 ft-16,316 ft12 hours1,727 ft to 6,587 fttech 9/106 stationssummer high countrymonsoon seasonJune
Distance50K
Gain+16,316 ft
Loss-16,316 ft
Altitude1,727 ft to 6,587 ft
Technicality9/10
Air30°F to 75°F
- Start6,316 ft
- High6,587 ft
- Low1,727 ft
- Finish6,316 ft
- Flagstaff at mile 0.0
- Flagstaff Extreme Big Pine 50K mile 6 at mile 6.2, cutoff 2.4000000000000004 hours
- Flagstaff Extreme Big Pine 50K mile 12 at mile 12, cutoff 4.800000000000001 hours
- Flagstaff Extreme Big Pine 50K mile 19 at mile 19, cutoff 7.199999999999999 hours
- Flagstaff Extreme Big Pine 50K mile 25 at mile 25, cutoff 9.600000000000001 hours
- Finish Arizona at mile 31, cutoff 12 hours
Field, 2026 · 12-year sampleresults
Starters130
Finish rate90%
Median7:18
Sub-24117
Geometrycourse math
Steepest drop1,667 ft-16.9% over 1.9 mi
Longest climb4,596 ft11 mi at 7.8%
Course records
Men3:32:18Trueheart Brown
Women4:12:56Natalie Sandoval
The cruxHigh country climbs (near mile 33)
Course DNA
The Course
Flagstaff Extreme Big Pine 50K runs 50K through Flagstaff, Arizona. +16,316 ft gain and -16,316 ft loss. Surfaces skew 85% trail. High country climbs. High point near 6,587 ft. Low near 1,727 ft. June temps run 30°F to 75°F. The course rewards patience early and punishes rushed descents after mile 25.
The Work
Train for 16,316 feet of climbing across 50K. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 12 hours total means limited margin: rehearse fueling every 45 to 60 minutes and downhill eccentric work weekly. Technicality 9/10. Build a block that simulates the crux near mile 33.
Kit
June in Flagstaff, Arizona: plan for 30°F to 75°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 12 hours pushes past dark. Poles help on sustained climbs above mile 13. Vest capacity for 2 liters minimum. Shoes matched to 85% trail: lugs for mud, rock plate if the course turns technical after mile 25.
Race Day
Hold effort through mile 13. The field often splits on the first big climb after mile 25. High country climbs near mile 33 is where time is won or lost. Walk the steep pinches. Run the flats and gentle downhills. Crew at major aids: socks, calories, ice if hot. Transitions under 5 minutes when possible. Final third is 17 miles of fatigue management. Finish with reserve for the last descent.
Results
Flagstaff Extreme Big Pine 50K finish lines.
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Sources (2)
- Field stats (2026): https://ultrasignup.com/results_event.aspx?did=129568
- Course record (M): https://ultrasignup.com/results_event.aspx?did=120806