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Step 3 · Race Day

Plan race day, not just the training block

Pacing splits, HR zone strategy, nutrition timelines, and weather-aware plans — because the race is where all your training gets tested.

Why race day needs its own plan

Training gets you to the start line. Race-day strategy gets you to the finish. They are different problems. A 100-mile race is 20+ hours of decisions: when to push, when to eat, when to walk, when to change layers. Those decisions should not be improvised at 3 AM when you are exhausted.

The Race Planner turns your goal time, the course profile, and the weather forecast into a concrete plan — mile-by-mile splits, heart rate zones by terrain, an hour-by-hour nutrition timeline, and aid station notes your crew can read.


What the Race Planner builds
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Pacing splits. Mile-by-mile or segment-by-segment pace targets, adjusted for elevation and terrain. No more guessing whether 12:00 is right for that 2,000-foot climb.

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Heart rate zones. Target HR ranges by segment so you do not blow up in the first 20 miles. Different zones for climbs, descents, and flats.

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Nutrition timeline. Hour-by-hour calorie, fluid, and sodium targets based on your body weight, the heat, and the expected duration.

•

Weather-aware strategy. A hot forecast changes your fluid and sodium targets. A cold start changes your layering plan. The planner factors in the forecast.

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Aid station notes. What you need at each station — drop bag contents, crew tasks, pacer exchanges — exported as a packet your crew can follow.


How to use it
1

Enter your race and goal time

Add your race name, distance, elevation gain, and your goal finish time. The more accurate the inputs, the better the splits.

2

Review your splits and HR zones

The planner generates a segment-by-segment breakdown with pace and HR targets. Adjust anything that does not feel right — this is your plan, not a prescription.

3

Build your nutrition timeline

Based on your weight, the heat, and the duration, you get hourly calorie, fluid, and sodium targets. If you have logged fueling in past long runs, we use that to personalize the plan.

4

Push it to your crew

Once your race plan is built, you can push the aid station list and crew notes straight into Crew Central so your team has everything on race day.

Pro tip: Build your race plan 2–3 weeks out, then revisit it as the weather forecast firms up. A plan built the night before is better than nothing, but a plan refined over a few weeks accounts for everything.

Watch out: A race plan is a guide, not a contract. If conditions change on race day — unexpected heat, a delayed start, a stomach issue — adjust. The plan gives you a baseline to deviate from intelligently, not a rigid script.

Plan your race day

Enter your race and goal time to generate splits, nutrition, and HR zones.

Open the Race Planner

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.
Crew
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.

Free to start. Sign up and try the AI coach, race planner, and crew tools, no credit card.

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