At the end of each June, over 1000 horses that for most of the year run semi-wild in the marshland, plains and forest that surround the Andalusian town of Almonte are rounded up by yegüerizos, the horsemen who hold sway over these large herds. The annual La Saca de las Yeguas dates back over 500 years, and characterizes the rural Spanish landscape as much as Pamplona’s bull run, Buñol’s La Tomatina, and Haro’s La Batalla de Vino. Filmmaker Glen Milner spent four days with the riders, capturing the scale of the custom and the elegance of the horses as the animals were driven past the Hermitage of El Rocío to be blessed, and then into the town to thunder through the narrow streets. “Themes of tradition, and where tradition sits within modern society, really interest me,” explains Milner, who traveled to Greenland to shoot the first dawn of the year with Ben Hilton for Return of the Sun, a film that was shortlisted for Best British Short Film at the 2012 Leeds International Film Festival, and is currently working on a longer documentary about the Middle East. “After speaking with the horsemen in Almonte, and in particular their sons, it became apparent how much of their identity comes from their relationship with the land,” he says. “Horsemen as young as 15 talked of living in harmony with their surroundings and respecting the animals that share it.”