The Innsbrook Half Marathon
Race Day Weather
Cool start, steady climb
Runners will face a temperature rising from 52°F at the start to 64°F by the finish, with a light breeze from the S. Humidity will be moderate at 58%, so hydration should be prioritized. Pacing adjustments may be necessary as temperatures increase; starting conservatively is advisable.
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Race Info
The Innsbrook Half Marathon is held each fall at Innsbrook Resort near Innsbrook, Missouri, about an hour west of St. Louis. Organized by Big River Race Management, it runs alongside a companion 10k on a hilly loop course that mixes paved roads with gravel trails past the resort's lakes and over several dams. The event dates back to around 2020 and caps its field at 500 runners across both distances.
