Races
Dinosaur Valley
Glen Rose, Texas. Hill Country rock. Two fifty kilometer laps. Six thousand six hundred feet per hundred k.
63 mi22 hours584 ft to 912 fttech 5/106 stationsGolden Ticket racetwo lapsWSER qualifierNovember
Distance63 mi
Altitude584 ft to 912 ft
Technicality5/10
Air40°F to 85°F
- Start682 ft
- High894 ft
- Low584 ft
- Finish787 ft
- Texas at mile 0.0
- Dinosaur Valley mile 13 at mile 13, cutoff 4.4 hours
- Dinosaur Valley mile 25 at mile 25, cutoff 8.8 hours
- Dinosaur Valley mile 38 at mile 38, cutoff 13.2 hours
- Dinosaur Valley mile 50 at mile 50, cutoff 17.6 hours
- Finish Texas at mile 63, cutoff 22 hours
Field, 2025 · 9-year sampleresults
Starters258
Finish rate88%
Median17:32
Sub-24212
Geometrycourse math
Steepest drop230 ft-2.3% over 1.9 mi
Night miles25 misunset near 17:00 local
Course records
Men9:58:18Meng Zhao
Women11:01:01Aimee Warnke
The cruxDouble 50k lap on rocky Hill Country trail (near mile 40)
Course DNA
The Course
Dinosaur Valley runs 100 km through Texas. Surfaces skew 80% trail / 20% dirt road. Double 50k lap on rocky Hill Country trail. High point near 912 ft. Low near 584 ft. November temps run 40°F to 85°F. The course rewards patience early and punishes rushed descents after mile 31.
The Work
Train for the climbing across 100 km. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 22 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 40.
Kit
November in Texas: plan for 40°F to 85°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 22 hours pushes past dark. Poles help on sustained climbs above mile 16. Vest capacity for 2 liters minimum. Shoes matched to 80% trail: lugs for mud, rock plate if the course turns technical after mile 31.
Race Day
Hold effort through mile 16. The field often splits on the first big climb after mile 31. Double 50k lap on rocky Hill Country trail near mile 40 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 21 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=122077
- Course record (F): https://ultrasignup.com/results_event.aspx?did=111284