Races
Flagstaff Extreme Big Pine 50K
Flagstaff Extreme summer 50K. Pine forest vert at 7,000 feet when the desert floor hits triple digits.
50K+6,988 ft-6,988 ft12 hours1,725 ft to 6,603 fttech 6/10Checkpoints per race booksummer high countrymonsoon seasonJune
Distance50K
Gain+6,988 ft
Loss-6,988 ft
Altitude1,725 ft to 6,603 ft
Technicality6/10
Air30°F to 75°F
- Start6,316 ft
- High6,603 ft
- Low1,725 ft
- Finish6,316 ft
Field, 2026 · 12-year samplescraped
Starters130
Finish rate90%
Median7:18
Sub-24117
Geometryderived
Steepest drop1,634 ft-15.7% over 2.0 mi
Longest climb4,590 ft11 mi at 7.8%
Course records
Men3:32:18Trueheart Brown
Women4:12:56Natalie Sandoval
The cruxHigh country climbs when Phoenix bakes below (near mile 33)
Course DNA
The Course
Flagstaff Extreme Big Pine 50K runs 50K through Flagstaff, Arizona. +6,988 ft gain and -6,988 ft loss. Surfaces skew 85% trail / 15% dirt road. High country climbs when Phoenix bakes below. High point near 6,603 ft. Low near 1,725 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 6,988 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 6/10. 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 when Phoenix bakes below 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