Warrior Dash is back this weekend with thousands of participants signed up for the extreme race in Genesee Township.
Sunday 26,000 competitors will go through fire and mud.
Organizers tell us they are doing everything they can to make sure everyone stays safe.
200 people became sick last month with stomach flu in Jackson County during a separate Warrior Dash event.
About $2.5 million is raised by the races that goes to St. Judes charities across the US.