Color Us Excited: Graffiti Run My brother Shadow and I have talked about doing a color run for three years now. In 2011, I ended up with runner’s knee in both legs from overuse. Naively, I ran too much mileage without building up any muscle or endurance. Since that time, I haven’t been able to jog or run without significant knee pain. It’s an issue I need to address but I knew I could handle a fun, color-filled 5K so we registered for the Graffiti Run at Sports Authority Field at Mile High.