The 3M Half Marathon will celebrate its 20th anniversary this year and invites you to join. The race is a fast 13.1-mile north-to-south course through an urban setting and is mostly (but not exclusively) downhill. Previously named "Austin Race of the Year” and awarded “Best Schwag” for its legendary goodie bag, this half marathon is a perennial favorite with Austin runners and one of the capital city’s largest distance road racing events. Register now as the race is capped at only 8,000 participants. The half marathon benefits Communities in Schools of Central Texas.