Are You Ready, Boise? The World’s Most Colorful 5K Is Headed Your Way! Run or Dye, the world’s most colorful 5K, is headed to Parkcenter Park on June 28. Bring all your friends and run a color-blasted 5K, where you get showered in safe, eco-friendly, plant-based cornstarch dye every kilometer. Then enjoy our world-famous Dye Festival afterward, where you can Tie-Dye the Sky (not to mention all your friends!) in this ultimate celebration of life, friendship, fitness, and fun. Need more info? Click here!