Replay a trail's elevation profile on your treadmill. Upload a GPX file and get time-based incline intervals.
Drop a GPX file here or
The tool converts distance-based elevation into time-based intervals at your chosen speed. Each row shows the treadmill incline to set for that time window. Slopes beyond your treadmill's maximum are capped and highlighted.
Treadmill training lets you rehearse the exact climb profile of a race course when the real terrain isn't accessible — whether due to weather, travel, or season. By matching the gradient changes of your target route, you build the specific muscular endurance and pacing instincts that flat running can't develop.
This is especially effective for preparing for mountain ultras: replaying the steepest 10K section of a race at the correct incline teaches your legs (and your brain) what sustained climbing at race effort actually feels like. Pair it with the Fuel Calculator to practice nutrition timing during simulated long climbs.
Everything runs in your browser. Your GPX file is never uploaded.