Races

Bighorn

WyomingJune

Dayton. Bighorn canyons and red clay. If it rains, Dry Fork becomes the whole race.

100 mi+10,984 ft-11,157 ft35 hours3,927 ft to 8,983 fttech 8/1014 stationsout and back76 mi single-trackWSER qualifierJuneWSER qualifierHardrock qualifier
Distance100 mi
Gain+10,984 ft
Loss-11,157 ft
Altitude3,927 ft to 8,983 ft
Technicality8/10
Air25°F to 90°F
Gradient profileOfficial race GPX
  • Start4,101 ft
  • High8,983 ft
  • Low3,927 ft
  • Finish3,927 ft
Aid stations18 stops verified
  1. Upper Sheep Creek at mile 8.3
  2. Dry Fork at mile 13, cutoff 4.5 hours, crew, drop bag
  3. Cow Camp at mile 20
  4. Bear Camp at mile 24, cutoff 9 hours
  5. Sally's Footbridge at mile 30, cutoff 11.5 hours, crew, drop bag
  6. Cathedral Rock at mile 34
  7. Elk Camp at mile 39
  8. Spring Marsh at mile 43
  9. Jaws Trailhead at mile 48, cutoff 17.5 hours, crew, drop bag
  10. Elk Camp II at mile 57
  11. Cathedral Rock II at mile 62
  12. Sally's Footbridge II at mile 66, cutoff 25 hours, crew, drop bag
  13. Bear Camp II at mile 72
  14. Cow Camp II at mile 76, cutoff 29 hours
  15. Dry Fork II at mile 83, cutoff 30.5 hours, crew, drop bag
  16. Upper Sheep Creek II at mile 88
  17. Tongue River at mile 95
  18. Finish Scott Park at mile 100, cutoff 34 hours, crew

Terrain

trail76%jeep16%paved8%

Field, 2024 · 10-year samplescraped

Starters500
Finish rate0%

Geometryderived

Steepest drop1,696 ft-15.3% over 2.1 mi
Night miles34 misunset near 19:00 local
Time over 8k ft12%

Weather at the cruxderived

At hour 8 of race, feels like 36 C (90 F).Sample of 7 race days, medium confidence.At hour 8 of race, apparent temperature P90 is 36 C / 97 F.

Course records

Men17:58:03Bo Shelby2026 editorial
Women21:02:37Nicole Laughton2025 editorial

The cruxThe Bighorn mud and the climb out of Dry Fork

Course DNA

The Course

Thick red clay mud. Mountain canyons. Singletrack. Dry Fork is the long climb. If it rains, the clay sticks and adds 5 pounds to each foot. Jaws sits high. Low 4,600 feet. High 9,400. Trail 76 percent, jeep 16, paved 8.

The Work

Lifting mud-caked shoes loads the hip flexors and hamstrings. Lower back joins in. Core has to hold. Cold and wet on the high ground, heat in the canyons. Train mud running. Weighted hikes. Cold-weather work.

Kit

Deep, widely spaced lugs. Salomon Speedcross or Saucony Peregrine. They shed clay. Durable poles for the slick slopes. Extra dry socks. Anti-chafing cream for wet feet.

Race Day

If the mud hits, forget pace. Poles. Forward. Keep calories high. Save the running for drier valley singletrack. Jaws at mile 48 is cold, wet, and muddy. Rough mountain roads for crew. Sub-freezing is normal. Hot food. Dry shoes. Fresh socks. Then leave.

Results

Bighorn finish lines.

Winner: Bo Shelby, 17:58:03.

Bighorn

100MDayton, WY

Sources (5)

Bighorn