Races
McDowell Mountain Frenzy 50 Miler
McDowell Mountain Regional Park. Thompson Peak above Scottsdale. Seven thousand feet of desert vert. Perfect winter weather on Sonoran singletrack.
50.1 mi+5,263 ft-5,267 ft15 hours1,547 ft to 3,766 fttech 5/10Checkpoints per race bookDesert Runner seriesThompson PeakSonoran Desert CupDecember
Distance50.1 mi
Gain+5,263 ft
Loss-5,267 ft
Altitude1,547 ft to 3,766 ft
Technicality5/10
Air40°F to 75°F
- Start1,640 ft
- High3,766 ft
- Low1,547 ft
- Finish1,637 ft
Terrain
Field, 2025 · 14-year samplescraped
Starters90
Finish rate79%
Median12:23
Sub-2471
Geometryderived
Steepest drop1,398 ft-12.5% over 2.1 mi
Night miles12 misunset near 17:00 local
Course records
Men6:18:41Bryan Kerl
Women7:12:27Abby Hall
The cruxThompson Peak climb with 360-degree Valley views near mile 30 (near mile 33)
Course DNA
The Course
McDowell Mountain Frenzy 50 Miler runs 50.1 mi through Fountain Hills, Arizona. +5,263 ft gain and -5,267 ft loss. Surfaces skew 92% trail / 5% dirt road / 3% paved. Thompson Peak climb with 360-degree Valley views near mile 30. High point near 3,766 ft. Low near 1,547 ft. December temps run 40°F to 75°F. The course rewards patience early and punishes rushed descents after mile 25.
The Work
Train for 5,263 feet of climbing across 50.1 mi. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 15 hours total means limited margin: rehearse fueling every 45 to 60 minutes and downhill eccentric work weekly. Technicality 5/10. Build a block that simulates the crux near mile 33.
Kit
December in Fountain Hills, Arizona: plan for 40°F to 75°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 15 hours pushes past dark. Poles help on sustained climbs above mile 13. Vest capacity for 2 liters minimum. Shoes matched to 92% 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. Thompson Peak climb with 360-degree Valley views near mile 30 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
McDowell Mountain Frenzy 50 Miler finish lines.
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Sources (2)
- Field stats (2025): https://ultrasignup.com/results_event.aspx?did=124496
- Course record (M): https://ultrasignup.com/results_event.aspx?did=92221