Rainbow Marathon is a rainbow run, which is an extension of the traditional Indian festival Holi. After referring to Indian Holi Festival, Western Tomato Festival and other similar festivals, after careful planning, the activity of spreading colored powder along the way was officially named Rainbow Run, and various details were improved to form a rainbow run mode.

The colorful run is called the happiest 5 km rainbow run on earth by many people. It was originally called "Color Run". Later, the organizer changed it to "Rainbow Run" to advocate a healthy life and focus on happy running.