Import your GPX track. Get your real passage times, weather segment by segment, and your complete race plan — before you even lace up your shoes.
A GPX profile that goes up and down, without really saying by how much. A general forecast that says nothing about what awaits you at 3am at altitude. A time goal picked somewhat at random.
You're an ultra-trail runner, or simply someone who likes to prepare seriously for their races — and you deserve better than a guess.
Segly turns a raw file into a complete race plan — segment by segment, condition by condition.
A general forecast says nothing about what's happening at 2,500 meters, at 3am, on segment 7. Segly shows temperature, wind, and precipitation at every point of your route, from ten days before the start.
You know whether to pack a thermal layer, bring the windbreaker, or increase your hydration — well before the race brutally reminds you.
A total elevation gain says nothing about the reality of the terrain. Two segments with the same elevation gain can be a steady climb or a 25% wall hidden inside a flattering average.
Segly's detailed graph colors every slope change, from blue for descents to dark red for the steepest sections — with the exact percentage shown on each portion.
Divide and conquer. Segly splits your route using 5 different modes — automatic at key points, by slope change, by distance, by duration, or 100% manual to match your segments to the official aid stations.
Rename each segment however you like — a pass, an aid station, a village. Your plan becomes readable for you and your crew.
No need to aim for a random goal. Enter your ITRA score, UTMB Index, Be Trail level, or VMA — Segly calculates an estimate from your level, elevation gain, terrain technicality, and even the forecast weather.
And to stay honest about the accuracy of an estimate, every result is shown with a ±10% range — to secure your goal without false certainty.
One link, and your team sees everything: your segments, your estimated passage times, your notes, the weather at every point. No more explaining your plan over the phone the night before the race.
And thanks to built-in navigation, they can reach any aid station in one click — no more struggling to find each other on a route they don't know.
Most pre-race anxiety comes from what you don't know: where the walls are, how long that never-ending climb will last, what the night segment will look like. Visualizing your race in detail means already running it once in your head.
Runners who use Segly before a race all say the same thing: fewer surprises during the race, more calm at the start. You know what's coming — all that's left is to live it.
Starting too fast is the number one cause of DNFs in ultra-trail. With precise passage times and a fatigue factor matched to your level, you manage your pace instead of enduring it.
Result: fewer collapse phases, a better-controlled finish, and a time goal that becomes a reliable benchmark rather than a number picked at random.
Carbs, sodium, caffeine, water — each segment shows the recommended intake based on estimated duration and your personal goal. No more calculating yourself how many gels to plan before the big wall at km 60.
And for sodium and water, let Segly do the math for you: needs automatically adjust based on each segment's weather — more sodium and water planned for the hottest sections.
88 km, 6,200 m elevation gain, 4:45am start, snow sections at 2,500 m altitude. Exactly the kind of race where a precise plan changes everything.
Runners like you, who decided to stop improvising their preparation.
One ultra a year or training all year round — Segly adapts to your usage, not the other way around.
Segly is a tool born on the trails. Every feature has been field-tested, during real races, by people who've been cold at a mountain pass at 3am and suffered from a bad plan at km 60.
You can try the monthly or annual subscription for 10 days at no charge. During this period, you get access to all features with no track limit — after that, the full subscription automatically takes over, unless you cancel before the trial ends.
The Race Pass gives full access to all features for a single GPX track, with no commitment. The subscription (monthly or annual) gives unlimited access to as many tracks as you want, for the entire subscription period.
Yes. All your past analyses remain viewable even without an active subscription. However, without an active subscription or Race Pass, you can't start a new analysis with premium features.
Weather is available as soon as your start date is within 10 days — beyond that, forecasts aren't reliable enough to display. It's provided as a guide: you always adjust your progression factor based on the conditions shown.
Trail, ultra-trail, hiking, and even road racing. Segly adapts to any GPX file — from a long training outing to an ultra spanning several hundred kilometers.
A question? A suggestion? We're here for you!
Import your GPX. Get your complete race plan in minutes.
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