September 2025 Marathon Calendar

🎉 A New Era Begins — Website for 2026 and beyond launching soon!

This website started as an experiment, and has grown to thousands of weekly visitors. We're grateful for your support and excited to launch a completely redesigned platform, marathon directory, and more for 2026 and beyond.

Want early access to the new site, interested in working together, or have ideas for features? Let us know!

Get Updates

Plan your September race schedule with our interactive calendar.

Currently tracking • • •

September 2025

View full list

U.S. races only

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