Races
Devil Dog 100
Prince William Forest Park. Five twenty mile loops plus three miles. Ten thousand five hundred feet of gentle rollers that lie about difficulty.
100.75 mi+3,010 ft-3,091 ft30 hours65 ft to 395 fttech 5/10Checkpoints per race bookfive 20 mile loopsrunnableMarine Corps heritageOctober
Distance100.75 mi
Gain+3,010 ft
Loss-3,091 ft
Altitude65 ft to 395 ft
Technicality5/10
Air40°F to 70°F
- Start314 ft
- High395 ft
- Low65 ft
- Finish233 ft
Field, 2019 · 4-year samplescraped
Starters98
Finish rate49%
Median29:15
Sub-244
Geometryderived
Steepest drop243 ft-1.6% over 2.9 mi
Course records
Men17:35:06Bradley Revenis
Women24:56:23Colleen Jay
The cruxLoop five when the roots and leaves hide the rocks (near mile 65)
Course DNA
The Course
Devil Dog 100 runs 100.75 mi through Prince William Forest Park, Virginia. +3,010 ft gain and -3,091 ft loss. Surfaces skew 80% trail / 20% dirt road. Loop five when the roots and leaves hide the rocks. High point near 395 ft. Low near 65 ft. October temps run 40°F to 70°F. The course rewards patience early and punishes rushed descents after mile 50.
The Work
Train for 3,010 feet of climbing across 100.75 mi. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 30 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 65.
Kit
October in Prince William Forest Park, Virginia: plan for 40°F to 70°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 30 hours pushes past dark. Poles help on sustained climbs above mile 25. Vest capacity for 2 liters minimum. Shoes matched to 80% trail: lugs for mud, rock plate if the course turns technical after mile 50.
Race Day
Hold effort through mile 25. The field often splits on the first big climb after mile 50. Loop five when the roots and leaves hide the rocks near mile 65 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 33 miles of fatigue management. Finish with reserve for the last descent.
Results
Devil Dog 100 finish lines.
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Sources (2)
- Field stats (2019): https://ultrasignup.com/results_event.aspx?did=68784
- Course record (M): https://ultrasignup.com/results_event.aspx?did=38982