The Innsbrook Half Marathon
Race Day Weather
Cool start, gradual warm-up
Runners will face temperatures starting at 50°F and rising to 63°F by the finish. With humidity at 65% and light winds from the SSW, it’s advisable to start conservatively and adjust pacing as temperatures climb. Hydration should be prioritized as the race progresses.
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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.
