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Insomnia 100

Townsville City, Australia • 27-29 Sep 2025

The Insomnia 100 is an ultra-running event held in Townsville, Australia, organized by the Townsville Triathlon Club. It features two main races: the Riverway Insomniac 100 Ultra and the Riverway Insomnia 42 Marathon. The unique format involves completing laps of a 4.2 km course every hour for 24 hours, alternating between clockwise and anti-clockwise directions.

Solo runners or teams of 2-4 can participate, with team members alternating laps. The event includes a semi-secure rest area and encourages self-sufficiency in nutrition and hydration. Proceeds support the humanitarian charity Prevail, aiding trauma care in Ukraine.

The event is sanctioned by AusTriathlon and has age restrictions. Visit the organization's website for the most recent information.

Australia Townsville City

Race information

Registration
100 km
Insomnia 100 Ultra (100 Km)
42 km
Insomnia 42 Marathon (42 Km)
Visit the organization's website for the most recent information.
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