The science of the
decisive moment.

Questions runners ask

What is a race strategy plan?

A segment-by-segment plan for one specific race: the pace to hold on each climb and descent, what to eat and drink and when, how much sodium, where your crew meets you, and which cut-offs are actually at risk. It is built from the real course — the route, the climbs, the aid stations and the time limits — not a generic calculator.

How does Crux pace an ultra?

It models the course segment by segment using grade-adjusted pace, so a kilometre climbing 300 m is not treated like a flat one. Your target finish time, the terrain, the expected conditions and your own fitness set the effort for each section, and the plan shows the arrival window at every checkpoint against its cut-off.

Which races are supported?

Hundreds of trail and ultra races worldwide are already in the library with course data and a written guide — including the UTMB World Series. If your race is not there yet you can add it from a GPX file and plan it the same way.

What does it cost?

Your first race plan is free — one race, yours to keep — and reading the race guides is always free. After that, Base is €9/mo for about three races a month and Pro is €19/mo for unlimited races and the deeper race-day features.

Does it work for my race?

If it has a course profile it works — from a 20 km trail race to a 200-mile mountain event. The plan adapts to distance, climbing, altitude, expected weather and the cut-off structure of your specific event.