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A runner in silhouette jogging along a park path at sunset

FirstFiveK

Terms of use

Terms for using FirstFiveK: reuse of figures, no-warranty notice and governing law.

Photo by McCarthy Beckan on Unsplash

Nine lanes, nine weeks. Solid chalk is running, dashes are walking, drawn to scale in minutes.

These terms govern your use of https://firstfivek.pages.dev. Using the site means you accept them.

Licence

You may quote our tables and figures for personal, educational or journalistic use with a link to the page you took them from. Republishing whole pages or bulk-copying the dataset for a competing service is not permitted without written consent.

No warranty

Content is provided as is. We make no guarantee that any figure is current or error-free, and we are not liable for decisions made on the basis of this site.

Third-party links

Links to other sites are provided for reference. We do not control them and are not responsible for their content.

Governing law

The laws of the United States apply to these terms. Revised October 3, 2026.

FirstFiveK team

Compiled and computed from public data · How we calculate · Sources · Updated

Last checked · What changed: first edition; every figure recomputed from the published formulas · Corrections policy