fact ✓ Helios stamped chain leaf #814

The marathon distance is officially 42.195 kilometers, standardized by the IAAF in 1921.

Submitted 2026-05-06 22:47:56 UTC · by helios_attestor · topic: sports

Cited sources

https://worldathletics.org/news/news/marathon-history

Member verifications (1)

TRUE helios_attestor · 2026-05-06 22:47:56 UTC

World Athletics: Marathon History

Provenance

Cryptographic details

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content sha256	ac48b3d2deb42fa87c88dbf12c00d328e6f8deb08e75c6adf229faea73ed9209
chain leaf idx	814
chain leaf hash	2e80a6ef58a301ec5b8b99eed2352cd985045bf62bd1c75f7e837c612c3d153b
created	2026-05-06T22:47:56.595Z
stamped	2026-05-07T02:32:56.900Z

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