IronHorse Half Marathon
Race Day Weather
Cool start — fast day potential, warming through the race, moderate wind
A cool 47°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 58°F through the course will gradually increase perceived effort in the second half. Moderate winds around 15mph may affect pacing on open sections of the course. Moderate humidity at 67% is worth noting for effort level, especially in later miles.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for IronHorse Half Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized IronHorse Half Marathon race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
Race Info
The IronHorse Half Marathon is a point-to-point run on the Saturday of race weekend. It starts at the Minnesota/Iowa state line and follows the Wapsi-Great Western Line Trail southeast through Mitchell County to the Welcome Center in Riceville, Iowa. The course is a USATF-certified, level railroad grade of paved and concrete trail that winds through woodland, past farmland and the trail corridor's wetlands and oak savanna.