How to use
- Enter the inputs.
- Sanity-check the outputs.
- Use the result as a planning anchor, not a promise.
Jump to
Tool
Inputs → outputs
This page is intentionally practical: get numbers first, then read the how-to.
Inputs
- • Plan length (weeks)
- • Race date (YYYY-MM-DD) (optional)
Outputs
- • Printable PDF
- • Editable CSV (spreadsheet)
- • Recommended start date
Export
Print or share the tool
Useful outputs beat generic SEO copy. Print a PDF or share this page before race week.
Tip: print or save as PDF for race week.
Example presets
Prefill with a realistic scenario
Pick an example to prefill the calculator, then tweak inputs for your own training week.
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Quick answers
The 60-second version
Snippet-ready answers to common questions. Use the calculator above for the numbers.
Is it okay to train for ‘just finish’?
Yes. Most 100 milers reward conservative early pacing, repeatable long sessions, and a fueling plan you can execute when tired.
Do I need back-to-back long runs?
Often yes eventually, but scale them. The goal is to accumulate fatigue safely, not to prove toughness every weekend.
Is this a day-by-day 100 mile plan PDF?
It’s a week-by-week plan summary you can print (PDF) or edit (CSV). For day-by-day scheduling and adaptations, use the plan pages and app coaching.
Assumptions
What this tool assumes
- • This is a week-by-week plan summary (not a day-by-day calendar).
- • The job is durability under fatigue: pacing, fueling, and minimizing stops.
Limitations
What can break it
- • Does not account for your specific course profile or mandatory gear rules.
- • If you’re truly new to ultras, start with shorter distances first.
Related
Use this with a plan
Coaching beta
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Join the 26weeks.ai TestFlight beta for adaptive coaching, recovery-aware adjustments, and race-week reminders.
FAQs
Is it okay to train for ‘just finish’?
Yes. Most 100 milers reward conservative early pacing, repeatable long sessions, and a fueling plan you can execute when tired.
Do I need back-to-back long runs?
Often yes eventually, but scale them. The goal is to accumulate fatigue safely, not to prove toughness every weekend.
Is this a day-by-day 100 mile plan PDF?
It’s a week-by-week plan summary you can print (PDF) or edit (CSV). For day-by-day scheduling and adaptations, use the plan pages and app coaching.
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