Free tools
Tools that know ultras.
Free tools for ultra runners. ML-powered race time predictor, cutoff buffer calculator with printable race-day strips. No signup required.
01
Ultra Race Time Predictor
Course-aware
Upload your race GPX and a recent race result. Get a course-aware ML-predicted finish time with per-segment splits and a confidence range.
02
Aid Station Cutoff Calculator
5 featured races
Plan your buffer at every aid station cutoff. Pre-filled data for UTMB, Western States, Hardrock, Leadville, and Comrades — or paste cutoffs from any race.
Race-specific cutoff pages
Pre-loaded cutoff data and pacing advice for the most-searched ultras.
More from RunPact
Beyond free tools.
The free tools are the wedge. The full app turns predictions into phase-based training plans tailored to your race, syncs with Strava for adherence tracking, and renders your race course in 3D so you know what you're running into.