2026 Sioux Falls Marathon - Sep 20

Loop (single) marathon course in Sioux Falls with 178m elevation gain. A fast, PR-friendly Boston qualifier rather than a pancake-flat one. The first half rolls through Terrace Park, downtown and the river parks with the two notable climbs around miles 2-3 and 9-13; the back half along the Big Sioux River greenway is far gentler, though runners report it is a subtle false-flat rather than dead flat. Total climbing is only about +178 m (586 ft), which is why it carries a high PR rating. USATF cer