Calculator

Planning library

Race planning guides

Use the calculator for the arithmetic. Use these guides to decide which official numbers to enter, how much stopped time to plan, and how to read the resulting pace card.

Last updated August 3, 2026

One planning problem at a time

A long race creates several different timing questions. Where are the checkpoints? Is the published distance cumulative? How much time will a bottle refill actually take? Does the cutoff apply to arrival or departure? A useful plan answers those questions explicitly instead of hiding them inside one optimistic finish estimate.

These guides stay within the calculator's transparent model: one average moving pace, known cumulative distances, and planned stop time. They explain how to build and inspect that baseline. They do not predict terrain, weather, fatigue, or performance.

Start here

Have the current runner guide open

Race websites, old spreadsheets, and last year's course details can disagree. Use the organizer's current published material for distance, station order, access rules, and cutoffs. Then enter those values in the aid-station calculator and compare the printed departures with the official rules.