PACE
Start right. Finish stronger.
A conservative open, controlled middle, and a finish you can still race.
Built for ultra runners.
Know your race before race day.
Build an ultramarathon race-day plan: pace, run/hike, fuel, cutoffs and a card you can carry. Save it, share a link, print it.
EXAMPLE
100 KM
- TARGET
- 18:30
- AVG PACE
- 11:06/km
PACE STRATEGY
11:45
Start
11:20
Early
11:05
Middle
10:50
Late
10:30
Finish
Estimated · 250 kcal/h · 60 g carbs/h · 500 ml/h
THE CALCULATOR
Ultras from 50 km to 100 miles.
Made for trail ultras — 50 km, 80 km, 100 km, 100 miles, and races like Karhunkierros. Enter the course, then get pace bands, hourly fuel, run/hike and cutoff buffers. No account.
FUEL
Know what to take in.
Hourly targets, a 30-minute schedule, and a pack list you can actually carry.
EXECUTION
When to run. When to hike.
Run/hike by section, cutoff buffers, and the moments that usually go wrong.
FAQ
Questions before you start.
- What does this calculator do?
- It builds a race-day ultra plan from distance, climb, time and conditions: pace by section, run/hike, hourly fueling, cutoff buffers, and a card you can print or share.
- Which races does it cover?
- Any trail ultra from about 50 km to 100 miles. The catalog includes races such as Karhunkierros. You can also type a name, upload a GPX, or enter distance and climb yourself.
- How is fueling calculated?
- Hourly energy, carbs, fluid and sodium from distance, time, heat and experience. Treat it as a starting point, not medical advice.
- Do I need an account?
- No. Plans stay on this device. A share link carries the plan in the URL — nothing is stored on a server.