The Great GO! St. Louis Halloween Race features a Half Marathon, 10K, 5K and 1-mile fun run with a special Halloween twist! From the serious road racer to the family dressed head-to-toe in costume, this is a can't-miss fall event. The Halloween festivities start with the Trick-or-Treat 5K, and the 10K and half marathon courses have some added adventure as well.

The excitement doesn’t end when the race is over! Get your top of the line finisher’s medal, show off your outfit at the costume contest, and enjoy the morning in picturesque downtown Eureka, MO where local restaurants, coffee shops and other local vendors will be set up for the post-race celebration! For the over-21 crowd, Schlafly will be on site to help you enjoy a post race brew.