How long does it take to complete the UTMB's 170 km?
From 20 to 46 hours: a huge spread in finish times
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How long does it take to complete the UTMB's 170 km?
Allow a maximum of 46h30 to complete the 170 km of the UTMB: that's the time cutoff in Chamonix. The elite come in under 20 hours, but most of the field crosses the arch between 40 and 42 hours. Finishing before the cutoff is already an achievement 🫡.
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Trail
24 Mon ➜ August 28, 2026Date confirmed
UTMB®
Chamonix-Mont-Blanc(74)15 km40 km57 km101 km148 km176 km300 km
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+1
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