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Nutrition Guides

Ultra Nutrition:Race Day Fueling Strategy

In an ultramarathon, nutrition is the race. These guides cover the science and practical strategy behind fueling for 50K to 100-mile efforts, with calculators that build your exact hourly plan.

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Complete Nutrition Guide + Calculator

Ultramarathon Nutrition Guide

Why gut strategy separates finishers from DNFs. Covers hourly calorie and carb targets by distance, sodium strategy, solid vs gel vs liquid calories, gut training protocol, and the most common race-day mistakes.

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Training Guides

50K to 100M plans and strategy

Gear Guides

Shoe reviews, kit lists, gear tracking

Welcome to Ultrarunning.ai

The definitive ecosystem for athletes pushing their limits.

Train
AI-personalized plans from 50K to 200M, adapted to your fitness, race date, and terrain.
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Coordinate race-day crew, pacers, aid stations, and drop bags with a shared live plan.
Race
Discover races, plan your pacing and nutrition, and visualize any course from a GPX file.

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