Mantario Marathon

Event Rules and Signup

Mantario Marathon

A Fat Ass event--No fee, no aid, no swag, no whining.


Event Rules

1. All competitors must be self-sufficient. Carry all that you need to be independent—adequate food, water, clothing, shelter, maps, compass, first aid and other equipment necessary to allow you to safely complete the event including spending a night under the stars.

2. During the event, stop to assist any participant you come across who needs or may need assistance.

3. Pack out what you pack in. This applies to what becomes garbage—food packaging, those socks that gave you the big blisters on the first day and any appendages that should happen to fall from your body during the run.

4. The burning of garbage, food, clothing, etc. is prohibited. Pack it in, pack it out.

Ready to Signup

We are using UltraSignUp for registration. 

Registration Opens Fri. Mar 28, 2025 @ 12:00 AM CT

September 27-28, 2025 Mantario Marathon, Whiteshell, MB 64K, 2-Day Stage


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