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Registration for the 100 Miles Challenge 2020 (Virtual Edition) is currently closed

Click HERE for details

Congratulations to all Nuts of Craze Ultra 2019
Click HERE to view Results / E-Cert

CRAZE ULTRA 2021 (9th edition)

Date: 9 Oct - 10 Oct 2021 (To Be Confirmed)

Start: From 7am Saturday 9 Oct 2021
Finish: By 7am Sunday 10 Oct 2021
Time Limit: up to 24hrs (cutoff by 7am on Sunday)
Venue: MacRitchie Reservoir, Singapore
Distances: 100km/72km/55km/45km/Mini Nuts 27km

The 100km of the Craze Ultra 2021 is a  qualifying race for the 2022 Western States 100 Miles Endurance Run (only 100km finishers under 22 hours will qualify)