Race pace

Grindstone Trail Running Festival by UTMB pace calculator

50K · Sat, September 19, 2026 · 50 km · 1550 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.

Official cutoff
9h 00
Clock pace
9:11 / km
Finish time including stops.
Moving pace
8:53 / km
What your watch needs while moving.
Effort pace
6:47 / km
Uses climb and descent adjusted distance.
Cutoff buffer
+1h 21
At the selected finish target.
Course from GPX
50.0 km
1550 m D+ · 0 m D-
Adjusted workload
65.5 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.

Start 07:00