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mi/ftkm/m
123km
Distance
6,700m
Elevation D+
2025
Latest Edition
Get Your Predicted Finish Time
Use our predictor tool to estimate your finish time based on your UTMB Index and data from 4 finisher records.
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Gear up for your 123km race
Trail Shoes
For 100+ miles on technical terrain, invest in shoes you've tested thoroughly. Salomon and Inov-8 are proven choices.
Hydration Vest
A well-fitting vest is crucial for 100+ miles. Salomon ADV Skin is the gold standard. Test any vest on long training runs first.
Trekking Poles
With 6,700m of climbing, poles will save your legs. Worth the investment for this much elevation.
Headlamp
You'll definitely run through darkness. Bring a reliable headlamp (300+ lumens) and a backup. Petzl and Silva are trusted choices.
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