DES MOINES (February 6, 2018) – The fourth annual Hinterland Music Festival, on Friday and Saturday, August 3 – 4, 2018, returns to the Avenue of the Saints Amphitheater in St. Charles, Iowa. It’s two days of music curated for people who love both music and the outdoors. The festival features a blend of music, camping, art, craft vendors, family engagement and more.