Trail Race Time Predictor: Estimate Your Finish Time

Predict your trail race finish time for free. Upload a GPX, enter a recent result, and get a data-driven time prediction you can share.

Looking for a pace per kilometre on a hilly route instead of a race finish time? Use the trail running pace calculator: https://trailia.run/tools/pace-calculator

How It Works

  1. Enter your target race details (name, distance, elevation gain)
  2. Optionally upload a GPX file for the target course for better accuracy
  3. Provide a recent trail race result (distance, elevation, finish time)
  4. Get an AI-powered finish time prediction with confidence level

The predictor uses grade-adjusted pace formulas combined with AI analysis. It takes your recent race performance and adjusts for the target course's elevation profile, distance, and terrain characteristics.

Features

  • Grade-adjusted pace calculation
  • GPX elevation profile analysis
  • Confidence level indicator (Low/Medium/High)
  • Shareable result card
  • Works for 10K trails to 100-mile ultras

FAQ

Do I need a GPX file? A GPX file is optional but recommended. It allows the tool to analyse the exact elevation profile for a more accurate prediction.

Where can I get a GPX file for my race? Most race organizers publish GPX files on their course page. You can also export routes from Strava or Garmin Connect.

How accurate are the predictions? Accuracy depends on the quality of your input data. A recent trail race of similar distance gives the best calibration. Predictions account for elevation gain/loss, grade-adjusted pace, and distance ratio.

Is my data stored? No. Your GPX file and race data are processed in memory and never saved.

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