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What races qualify for AC100?
For AC100, you typically need an official 50-mile or longer race with posted results inside the current qualifying window. Because requirements can change year to year, always confirm the current accepted-race rules on the official AC100 site before registering.
Last updated: 2026-02-18
What should be on your checklist?
Use this checklist to cover the essentials before race day or your next key training run.
- Check this season's official AC100 qualifying distance and deadline.
- Pick a race with reliable timing and public results.
- Choose a course profile that helps AC100 prep: climbing, heat, and long descents.
- Save your results link immediately after you finish.
What steps should you follow?
Follow these steps in order so your plan stays simple and repeatable under AC100-style conditions.
- Set your target AC100 year, then work backward to your qualifier timeline.
- Shortlist two or three qualifying races you can realistically travel to from SoCal.
- Build training around finishing steady, not forcing an aggressive pace.
- Submit proof early so any admin issue is fixable before deadlines.
Examples runners often consider in this region include events like Ray Miller, Sean O'Brien, Leona Divide, and other West Coast 50-milers, but only the current official AC100 list is authoritative.
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What should you read next?
Use these related guides to build a full plan across training, logistics, and race-day execution.
Which sources should you verify for current AC100 qualifier rules?
Use the official race website as the final source for qualifying distance, timing windows, and submission deadlines.