The Innsbrook Half Marathon & 10k 2026

The Innsbrook Half Marathon & 10k takes place at Innsbrook Resort in Missouri, located roughly an hour from St. Louis. Participants can select between a 13.1-mile half marathon or a 6.2-mile 10k. Both races follow a certified course that includes both paved sections and smooth gravel roads. The half marathon presents a more challenging route, whereas the 10k allows participants to finish more quickly with fewer inclines. Big River Race Management organizes the event, which limits registration to 500 runners to ensure small start waves and prevent course congestion. All finishers receive a custom medal, a long-sleeved shirt, a to-go lunch, live music, and a cold beer. 10k participants are provided the same finish-line amenities as those completing the half marathon.