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Know the course before you run it

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Race Pace Calculator

Pace your race from the real course profile: finish time, splits and per-checkpoint nutrition, adjusted for elevation.

Estimate finish time

An estimate based on your ITRA Performance Index, factoring in elevation gain, altitude and surface.

  • We analyze the elevation profile of the uploaded GPX track for the upcoming race.
  • Using an ML algorithm, we calculate the Technical Difficulty Index (TDI) of the course.
  • From these metrics, the real distance and elevation gain are converted into an equivalent distance in flat kilometers (FlatKM).
  • Your estimated finish time comes from your ITRA PI and the course's flat equivalent.

UTMB MCC

37.8km
·
58.8 FlatKM
Set your ITRA PI
Estimated finish
5:27:43
ITRA PI
5gels40g/h
4.1liters0.75l/h
11tabs400mg/h

Plan checkpoint nutrition

How much carbohydrate, water and electrolytes you need between checkpoints.

  • The course is split into segments between checkpoints.
  • For each segment, we estimate how long it will take, based on its difficulty.
  • From that time, we calculate the energy, fluids and electrolytes you'll need.
  • We flag the longest segment, where you risk running out of water.

UTMB MCC · Plan

ITRA 565·5:28
Aid
Distance
Time
Gain
Loss
Gels
Water
Salts
1
7.6km/7.6km
1:07/1:07
1071m+
46m−
1.0×40g(41g)
0.8L
2(400mg)
2
16.9km/9.3km
2:57/1:50
1116m+
439m−
1.7×40g(67g)
1.4L
4(800mg)
3
27.8km/10.9km
4:09/1:13
226m+
1155m−
1.1×40g(44g)
0.9L
2(400mg)
4
32.8km/5.0km
4:47/0:38
260m+
293m−
0.6×40g(23g)
0.5L
1(255mg)
#
37.8km/5.0km
5:28/0:40
20m+
222m−
0.6×40g(25g)
0.5L
1(268mg)
Aid
Distance
Time
Gels
Water
Salts
Import my GPX and calculate my race

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Free tools

GPX AnalyzerUpload any GPX and see the elevation profile, climbs, descents and terrain mix.Trail FinderExplore trail gradients on the map and build a loop from any point.Trail Race CalendarUpcoming trail races by country and distance, with course data.Terrain ChallengesCompare your terrain to the world's hardest courses.