The Spurs Austin International Half is a popular annual 13.1-mile road race in Austin, Texas, known for its fast, net-downhill “Downhill to Downtown” course that runs from north Austin into the heart of downtown. Formerly called the 3M Half Marathon, the event draws thousands of runners from across the U.S. and beyond, offering a lively race day with live music, enthusiastic crowds, and a festive finish line experience. In 2026 it’s sponsored by Spurs Sports & Entertainment as the official title partner.