Races
Dinosaur Valley
Glen Rose, Texas. Three laps. Nine thousand five hundred feet. Golden Ticket on the line.
101 mi+4,622 ft-4,819 ft35 hours1,037 ft to 1,242 fttech 5/10Checkpoints per race bookGolden Ticket racethree lapsWSER qualifierNovember
Distance101 mi
Gain+4,622 ft
Loss-4,819 ft
Altitude1,037 ft to 1,242 ft
Technicality5/10
Air40°F to 85°F
- Start1,234 ft
- High1,242 ft
- Low1,037 ft
- Finish1,037 ft
Field, 2025 · 9-year samplescraped
Starters76
Finish rate72%
Median31:03
Sub-247
Geometryderived
Steepest drop164 ft-1.5% over 2.1 mi
Night miles50 misunset near 17:00 local
Course records
Men19:34:20Mark Wooten
Women19:40:30Aimee Warnke
The cruxThird lap on tired legs in November sun (near mile 65)
Course DNA
The Course
Dinosaur Valley runs 100 mi through Texas. +4,622 ft gain and -4,819 ft loss. Surfaces skew 80% trail / 20% dirt road. Third lap on tired legs in November sun. High point near 1,242 ft. Low near 1,037 ft. November temps run 40°F to 85°F. The course rewards patience early and punishes rushed descents after mile 50.
The Work
Train for 4,622 feet of climbing across 100 mi. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 35 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
November in Texas: plan for 40°F to 85°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 35 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. Third lap on tired legs in November sun 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
Dinosaur Valley finish lines.
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Sources (2)
- Field stats (2025): https://ultrasignup.com/results_event.aspx?did=122076
- Course record (F): https://ultrasignup.com/results_event.aspx?did=111283