A New Era for Ninja in Ontario Starts Now

Get ready for a brand new, athlete first ninja league built by and for Ontarians who live and breathe the sport. This league is designed to celebrate all Ontario athletes. The goal? To create clear, competitive pathways to national and international competitions, all under the trusted guidance of Obstacle Sports Canada.

NOSO is a registered not-for-profit.

Register for Ninja Mania

Join us for three adrenaline charged days at the Caledonia Fairgrounds on April 24–26, 2026. Ninjas will compete in three events: Speed, Endurance, and Head to Head with podiums for each individual event as well as recognition for overall performance. Top ninjas in each division will be crowned Ninja Mania Champions!