Design a Triathlon Course.
Swim. Bike. Run. One Map.
A free, browser-based triathlon course designer. Draw the full course on real-world maps, assign swim, bike, and run legs segment by segment, and get per-leg distances, split times, and an overall race time — then export GPX for your watch or bike computer. No download required.
Three disciplines, one continuous course.
RaceTrackDesigner started as a race circuit design tool — but pick the Triathlon class and it becomes a full triathlon route planner. Draw one continuous course from the swim start to the finish line on a live map of anywhere on Earth, then assign each segment to a discipline: swim, bike, or run. The three legs are drawn as separate surfaces on the map, so the whole course reads at a glance.
Each leg is simulated with its own physics. The open-water swim holds a steady stroke of about 5.2 km/h no matter how the buoy line curves. The bike leg winds up to roughly 50 km/h on the straights, then brakes and corners like a real rider. The run holds a fast pace to the line. The stats panel reports every leg's distance and time in swim–bike–run order, plus an estimated overall race time — so you'll know whether that bike leg really is 40 km before anyone pumps a tyre.
When the course is right, export a GPX file for watches and bike computers, KML for Google Earth, or share a short link that lets your club — or your race committee — open and keep editing the exact same course.
Built for swim–bike–run, not bolted on.
Three Legs, One Course
Draw the whole course from start to finish, then assign every segment to swim, bike, or run in the Surface tab. Each leg renders as its own surface on the map, and legs can be reassigned at any time.
Leg-by-Leg Splits
The stats panel lists each leg's distance and time in swim–bike–run order alongside an estimated overall race time — check every leg against its target length as you draw.
Honest Physics Per Leg
A steady ~5.2 km/h open-water stroke that gentle curves don't slow, a bike leg reaching ~50 km/h that brakes and corners like a real rider, and a fast run pace to the line.
Speed Bands & Km Markers
The course is coloured by speed, so the three disciplines read as three distinct bands — and a marker lands at every whole kilometre for aid stations and split planning.
Real Maps & Satellite
Search any lake, coastline, or city, jump to your current location, and toggle satellite imagery to trace real open water and real roads — the course exists where the race will.
Export & Share
Export GPX for watches and bike computers, KML for Google Earth, or XML waypoint data. Share a short link anyone can keep editing, or render a course card image with one-tap social sharing.
From blank map to full triathlon course in minutes.
Choose the athlete
Open the designer, pick the human-powered side, choose a start-to-finish course, and select the Triathlon class. The app switches to race times, leg splits, and kilometre markers.
Draw the whole course
Place waypoints from the swim start to the finish line — across the water, out along the bike roads, and through the run. Drag anything to refine it, with a 30-step undo history behind you.
Assign the legs
Select segments and set each one to Swim, Bike, or Run in the Surface tab. The legs appear as separate surfaces on the map and every distance and time updates live.
Check splits — and take it with you
Compare each leg against its target distance, read the estimated race time, then export GPX for your watch or bike computer, or share the course as a short link.
A triathlon course lives on real geography.
A triathlon course is three route-planning problems wearing one race number. The swim needs real open water — a lake, a bay, a river — and satellite view lets you lay the buoy line on the water that's actually there. The bike leg needs real roads, measured honestly, because a course that's quietly 43 km instead of 40 changes everyone's race. The run needs to land back at the finish. Designing all three on one live map keeps the whole course coherent instead of stitched together from three separate tools.
The distances are up to you. The Olympic format — 1.5 km swim, 40 km bike, 10 km run — is the reference, but each leg is exactly as long as you draw it: lay out a 750 / 20 / 5 sprint, a 1.9 / 90 / 21.1 half, or a full-distance day out. The per-leg readouts make hitting a target format a matter of nudging waypoints, and because every design gets timed by the same three-discipline model, comparing two candidate courses is as simple as drawing them both.
And if a leg deserves its own deep-dive, the same tool goes further: the marathon route planner handles pure running courses with pace stats and km markers, while the per-segment surface system powering the legs is the same one behind rally stage design on the motorsport side.
Triathlon course design, answered.
Is the triathlon course designer free?
Yes. RaceTrackDesigner runs entirely in your browser with nothing to install and nothing to pay. An account is optional and only needed if you want to save courses to come back to later.
Can I design sprint, 70.3, or full-distance courses?
Yes. Each leg is exactly as long as you draw it, so you can lay out any format — a 750 m / 20 km / 5 km sprint, the 1.5 / 40 / 10 Olympic distance, a 1.9 / 90 / 21.1 half, or a full-distance course. The per-leg distance readouts make it easy to hit your target lengths.
How do I assign the swim, bike, and run legs?
Draw the whole course from start to finish, then select segments and assign each one to Swim, Bike, or Run in the segment panel's Surface tab. Legs can be reassigned at any time and every readout updates live.
How is each leg timed?
Each leg is simulated with its own physics: a steady open-water stroke of about 5.2 km/h that ignores gentle curves, a bike leg that reaches roughly 50 km/h on the straights but brakes and corners like a real rider, and a fast run pace to the line. The stats panel shows each leg's distance and time in swim–bike–run order, plus an estimated overall race time.
Can I export the course to my watch or bike computer?
Yes. Export the course as GPX for GPS watches, bike computers, and training apps, as KML for Google Earth, or as XML waypoint data. You can also render it as a high-resolution PNG image in ten visual styles.
Do I need an account?
No. Everything works without signing in. An optional free account adds saved courses, and shareable short links work either way — anyone who opens your link can keep editing the course.