The Flower Parade Festival, also known as the Bloemencorso Bollentreek, is a vibrant annual event coinciding with Keukenhof’s opening. It features a magnificent parade of floral floats. Normally, it ran from April 20 to 24 each year, with the grand parade covering 42 kilometers from Noordwijk to Haarlem. It’s a celebration of spring’s blooming beauty.