SEGLYEvery Segly feature, built for ultra-trail
Import your GPX, get a segment-by-segment race plan — weather, nutrition, gear, pace — and keep your crew informed in real time, from the first kilometer to the finish.
The two latest features
Built so your race plan stays useful once your bib is pinned on — not just before the start.
Road Book Assistance
Your race plan doesn't stay frozen at the start. With every check-in on course, Segly recalculates the estimated time at your next meeting point — with an optimistic / estimate / cautious range, ready to share with your crew.
- Automatic recalculation after every check-in
- ±10% range instead of a single number
- Share with your crew in one link
Intensity zones & adaptive gear
Segly compares your planned effort-pace on each segment to your reference pace for your level, and derives a relative intensity across 5 zones — the same principle as %VMA or %FTP zones. That intensity then directly adjusts the feels-like temperature used for your recommended gear.
- 5 zones, calculated segment by segment
- Full calculation shown, never a black box
- Gear adjusted automatically to your effort
Everything you need to prepare and race
Tools built to simplify route analysis and improve ultra-trail performance.
Analyze your route
5 GPX segmentation modes
Key points, slope changes, slope variations, fixed distance — or manual cuts directly on the graph.
Interactive route map
View your route on an OpenStreetMap. Hover the track to see elevation and cumulative distance at any point.
Ultra-detailed segments
Distance, elevation gain/loss, slope, difficulty, estimated pace and elevation graph — plus running totals from the start.
Edit segments after analysis
Split a segment by clicking its graph, delete it (automatic merge), or rename it — pass, climb, aid station...
Plan your race
Race simulation & pass times
Enter your start time to get estimated pass times. Lock the total duration to redistribute time without missing your goal.
Customized analysis
Adjust pace, level and discipline (running, trail, hiking) before analysis, then fine-tune the progression factor per segment.
Real-time weather per segment
Conditions, temperature, precipitation and wind at the estimated pass time of each segment — with automatic time adjustment if needed. Up to 10 days ahead.
Get ready
Nutrition & hydration per segment
Carbs, caffeine, sodium and water recommended by estimated duration — sodium and water calculated from the route's weather, hot segments (≥25°C) flagged.
Recommended gear per segment
Long sleeves, windbreaker, waterproof jacket, gloves, sun protection — based on precise weather or the category chosen before analysis.
Difficulty indicators
Slope, length and elevation combined to estimate each segment's difficulty, for better race strategy planning.
Export & share
Full export & sharing
Full PDF, share link, or per-segment GPX/PDF from each card's menu — handy for your watch or a recon.
Privacy by design
No mandatory sign-up, no intrusive ads: you stay in control of your files.
Free trial, no commitment
Several free analyses to try the tool. Go premium when you're ready to unlock all advanced features.
How it works
3 steps to analyze and structure your GPX route.
Import your GPX track
Drop your GPX file into Segly. No account needed, your data stays private.
Run the analysis
Choose a segmentation mode, set pace, level and start time — Segly instantly shows the forecast weather segment by segment.
Refine, then share
Explore the interactive map, adjust your segments, check pass times and export to PDF or GPX.
Everything you need to know before you start
Click “Get Started”, then drop your .gpx file onto the drop zone, or click it to open the file picker. Segly supports all GPX files up to 10 MB, no installation required.
5 modes to choose from: splitting at key points, at slope changes, at slope variations, by custom distance, or fully manual segmentation by clicking directly on the graph.
Distance, elevation gain/loss, average slope, estimated difficulty, recommended pace and elevation graph for each segment — plus running totals (total distance, total elevation gain, total time) shown in each card's header.
With a start time entered, Segly calculates the estimated pass time for each segment and fetches the forecast for that exact place and moment — conditions, temperature, precipitation, wind. Some conditions (headwind, heat, rain, snow, storm) trigger an automatic time adjustment, shown in detail. Forecasts available up to 10 days ahead.
Enter your target carbs, caffeine, sodium and water intake before analysis: each segment then shows the recommended amount based on its estimated duration. In automatic mode (Premium or Race Pass), sodium and water are calculated from the weather on your route (cold, mild, hot), and segments at 25°C or above are flagged so you remember to increase your intake.
Yes: long sleeves, windbreaker, waterproof jacket, gloves, sun protection — calculated from the precise weather at pass time, or from the category chosen before analysis if no start time was entered.
No, no sign-up is required to analyze a GPX track. Creating an account additionally lets you save your analyses and access premium features.
The Race Pass unlocks every feature on a single GPX track, with no commitment (€2/analysis, or €5 for a pack of 3). The subscription (€5/month or €29/year) gives unlimited access to as many tracks as you want for the duration of the subscription.
5 free analyses to discover Segly, with no sign-up or credit card required. The monthly or annual subscription adds a 10-day free trial with unlimited analyses — no charge if you cancel before the trial ends.
Mark the segments where your crew will be waiting as assistance points (RoadBook tab), then click “Share with crew”: Segly generates a link, viewable without an account, listing the meeting points with their estimated pass times. During the race, your crew enters your actual pass time and the following estimates are recalculated, with an optimistic / estimate / cautious range. Sharing is reserved for unlocked analyses (Premium or Race Pass).
In Level mode, each segment gets an intensity zone from 1 to 5: Segly compares your planned speed in effort-km to a reference speed that depends on your Segly Score, your discipline and how technical the terrain is. The zone also adjusts the recommended gear: the harder the effort, the more Segly dresses you as if it were warm.
Yes. With a level-based trail analysis, you choose between race and training once the analysis has started. Training mode offers 4 pace zones (recovery, base endurance, threshold, race-specific pace), all slower than your race time, and recalculates each segment's time accordingly.
Yes. Segly automatically detects the type of terrain along your track from OpenStreetMap data (runnable, technical, very technical) and applies it to the estimated times, segment by segment. You can always replace the detection with your own choice before starting the analysis.
Yes. On each segment you can enter a cut-off, either as elapsed time since the start or as a date and time limit. Segly shows your margin live and flags in red the segments where you would miss the cut-off. This feature is reserved for unlocked analyses (Premium or Race Pass).
Ready to prepare your next race?
Import your first GPX for free, no credit card required.
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