Splitsmith is in early access. Generate your free pacing preview now — the first 100 confirmed sign-ups get 20% off Race Pass when purchases open.

Splitsmith

20 courses, real data

Marathon pacing plans, by race

Real elevation profiles, typical race-day weather, and a live AI-generated sample strategy for each course — not a generic template with the city name swapped in.

Marathon Pacing Plans by Race — Splitsmith