MARATHON · HALF · TRIATHLON NEXT
PaceCast reads your Strava history and runs thousands of simulations of your race day — your fitness, every hill on the course, the weather you'll actually get. You get an honest finish-time range, splits that respect the elevation, and a gel-by-gel fueling plan.
Built on sport-science models, calibrated on real races: our 80% confidence bands covered 80% of them.
Anyone can print one bold number. PaceCast tells you the odds — and as race day approaches and the real forecast replaces climatology, you can watch the band tighten around your target.
The course is simulated segment by segment — grade, heat as the morning warms up, and your own late-race fade. The plan slows you on the climbs so the hills never decide your race for you.
Move along the course — planned pace adapts to every gradient
PaceCast learns how you slow down in the heat from your own hot-day runs, then applies the race-morning forecast, hour by hour.
Drink plan: ~400 ml/h
Carbs per hour matched to your race duration and intensity, mapped to a gel-by-gel timeline — with a warning if the plan exceeds what your long runs say your gut has practised.
7 gels · 78 g carbs/hour · fluids scaled to the forecast
Product-agnostic: your gels, our timing. Not medical advice.
Connect Strava — one tap, no file homework.
Confirm your past races so we learn how you race, not just how you train.
Pick your race by name. We know the course and the weather.
Get the band, the splits, the fueling plan — on your phone, on paper, on your watch.
Nobody predicts a 70.3 honestly — swim, bike, run and both transitions are different animals. The same engine handles all five legs, from your own multisport history.
The beta is free for runners who share feedback. Marathon and half-marathon first.
