The unique Run or Dye 5K race starts at 9:00 a.m. in the Lambeau Field parking lot.
Sponsored by Big Brothers Big Sisters of Northeastern Wisconsin, Run or Dye is making Green Bay one of several stops across the nation.
Runners, or walkers, are showered in multi-colored safe, plant-based cornstarch dye every kilometer of the race.
Registration can be done online and costs $55.
Later in the day, former Packers safety LeRoy Butler is taking part in a public autograph session at Waukesha Sports from 1:30 to 2:30 p.m.