Race pace

Arc of Attrition by UTMB pace calculator

Arc 100M · Fri, 22 January 2027 · 173 km · 5507 m D+

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Race-day pacing plan

Set a finish target and stopped-time budget, then use the GPX-derived split table for where the course should feel slow or runnable.

Clock pace
10:55 / km
Finish time including stops.
Moving pace
10:40 / km
What your watch needs while moving.
Effort pace
8:05 / km
Uses climb and descent adjusted distance.
Cutoff buffer
-
At the selected finish target.
Course from GPX
173.0 km
5507 m D+ · 0 m D-
Adjusted workload
228.1 effort-km
100 m climb = 1 km; 300 m descent = 1 km.
Hardest block
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Split plan will appear below.

Course-aware split plan

Five-kilometer blocks from the GPX, weighted by climb and descent load.