Milestone map
Milestone map
3 milestones
Complete a qualifying 50-mile or 50K race
6–12 months preceding 100-mile entry
Establish your ultra credentials by completing a 50-mile or 50K race within the 18 months preceding your 100-mile attempt. Most major 100-milers require this as an entry qualification. It also provides a realistic time predictor for your first 100.
Proof required
Submit: official finisher certificate or race results page showing your name, the 50-mile or 50K distance, and finish time.
What gets checked
- Result is from a named race listed on UltraSignup or an equivalent national race calendar
- Finish time is shown — a Did Not Finish (DNF) does not satisfy this milestone
- Race distance is clearly stated as 50K or 50 miles — marathon results do not qualify
Common mistakes
- Underestimating the 100's qualification requirements: many race directors require a 50-mile (not 50K) qualifier — check the specific race's entry rules
- Rushing the step-up: attempting a 50-miler on a marathon-only base, leading to injury or DNF
Resources
Foundationstart here
Depthgo deeper
Masteryfor the dedicated
What a verifier looks for
- Is the result from a named race on UltraSignup or equivalent — not a time trial or solo run?
- Is the distance clearly 50K or 50 miles, and was it finished (not a DNF)?
- Is the finish time shown?
You'll sign in first, then come straight back here.
Complete a 100-mile training block
20–24 weeks
Log 20–24 weeks of 100-mile-specific training peaking at 50–70+ miles/week with back-to-back long runs (two consecutive long days of 20+ miles each). Export the log from your GPS device or Strava. The back-to-back long runs are the single most important differentiator in 100-mile preparation.
Proof required
Submit: weekly training log exported from Strava or GPS watch showing 20+ weeks, peak weeks ≥50 miles, and at least two documented back-to-back long run weekends (2 × 20+ miles each).
What gets checked
- Log covers 20+ consecutive training weeks exported from GPS — not manually typed
- Peak weeks show 50+ miles with long runs documented by distance and time
- At least 2 back-to-back weekends are visible with dates and distances
Common mistakes
- Ignoring recovery: too many high-mileage weeks without recovery weeks, leading to injury before race day
- Skipping back-to-backs: training for 100 miles on single long runs alone — the consecutive-day fatigue simulation is essential for preparing to run on tired legs through the night
Resources
Foundationstart here
Depthgo deeper
Masteryfor the dedicated
What a verifier looks for
- Is the training log exported from GPS — not manually entered numbers?
- Are peak weeks ≥50 miles visible in the log?
- Are at least two back-to-back long run weekends identifiable with specific dates and distances?
You'll sign in first, then come straight back here.
Finish the 100-mile race within cutoff
1 race day
Cross the finish line of a named 100-mile race within the official cutoff time. The finisher certificate is the proof. Most races generate official certificates online within days of the event — the certificate or results page with your name, time, and race name is the definitive record.
Proof required
Submit: official finisher certificate or race results page showing your name, the 100-mile race name, and official finish time within the cutoff.
What gets checked
- Results page or certificate is from a named race listed on UltraSignup or equivalent registry
- Finish time is shown and is within the official cutoff (most 100-milers use 30-hour or 36-hour cutoffs)
- Your name matches the submission
Common mistakes
- Attempting without crew or pacer planning: 100-milers are crewed events — race logistics preparation is as important as physical training
- Arriving undertapered: racing within 2 weeks of heavy training volume rather than completing a proper 3-week taper
Resources
Foundationstart here
Depthgo deeper
What a verifier looks for
- Is the result from UltraSignup or an official race website — not a GPS Strava upload?
- Is the finish time within the official cutoff for that specific race?
- Does the name match the submitter?
You'll sign in first, then come straight back here.
Part of