Skip to content
Endurance AnalyticsEndurance Analytics
  • Calendar
  • Trail Finder
  • Geo Quiz
  • Challenges
  • Blog
Trail runningBiathlonSkiingSkimoOlympicsCalendarTrail FinderGPX AnalyzerRace Pace CalculatorChallengesComparePricingConnect AIBlog

Know the course before you run it

© 2026 Endurance Analytics. All rights reserved.

Privacy policyTerms of serviceRefundsContact

GPX Analyzer

Upload a GPX track and get an instant course breakdown: elevation profile, gradient segments, the longest and steepest climbs and descents, and the terrain mix. Everything runs in your browser, so the file never leaves your device.

Drop a GPX file here or click to upload

GPX up to 10 MB

Demo: UTMB MCC

Distance
37.8km
Elevation gain
2701m+
Elevation loss
2162m−
High point
2212m

Demo: UTMB MCC

1.0×
37.8km
58.8FlatKM
2701m+
2162m−
2212max
503min
1.0×

Analyzing the course on the server: poles, extreme gradients, peaks…

Segment Details

Click a segment on the profile, on the lane below, or on the map.

Gradient matrix
Select a gradient
↑Uphill
↓Downhill
1
2
1
1
1
1
1
1
3
2
1
5
2
2
>40%
30%
25%
20%
15%
10%
3%
1
1
1
1
2
1
1
1
1
3
2
1
>5
3
2
1
0.5
0.3
0.2
km
0.2
0.3
0.5
1
2
3
>5
Extremes
Gradient breakdown
40% / 15.0km31% / 11.7km29% / 11.1km
↑Uphill
30–40%×10.4km
25–30%×21.7km
20–25%×21.8km
15–20%×32.1km
10–15%×74.1km
3–10%×95.0km
↓Downhill
25–30%×10.9km
20–25%×10.6km
15–20%×43.4km
10–15%×43.0km
3–10%×63.1km

Course

Elevation gain & loss

Endurance AnalyticsEndurance Analytics

How the course gains and loses height along the way. Above zero: cumulative gain (D+, red). Below zero: cumulative loss (D−, green), in the same colors as the elevation profile. The grey line on top is the elevation profile itself, shifted to start at zero, for orientation.

  • If the loss curve finishes further from zero than the gain curve, the course is net downhill.
  • A steep early rise means a hard start; a steep late one, a punishing finish.

Get the full course breakdown

Save this track to your profile to unlock the full analysis: corrected DEM elevations, technicality (TDI), surface types, pole advice, finish-time prediction and a checkpoint plan.

Save & analyze for free

Free tools

Race Pace CalculatorFinish time, checkpoint splits and fueling from the real course profile.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.