The Innsbrook Half Marathon

The Innsbrook Half Marathon is held at the Innsbrook Resort in Missouri on October 24, 2026, where the half marathon (13.1 miles) and the 10K both start at 9 a.m. The course is certified and mixes paved roads with gravel sections across scenic, demanding Midwest terrain. Big River Race Management organizes the event, which gives finishers a custom medal, a long-sleeve gift, a boxed lunch, live music and refreshments. The field is capped to keep the course from getting crowded.

Gravel stretches are the detail to train for: they are firm enough for road shoes but they cost a few seconds a mile and ask more of your ankles, so add unpaved miles to your long runs in the final month. A certified course means the distance is honest if you are chasing a time. Twelve weeks of steady training with one weekly long run will have most runners ready for the 13.1.