Iron Heart

Saint James, United States • 13 Feb 2026

Iron Heart is a multi-distance running event held in St. James, Missouri, offering a wide range of race options including 5K, 10K, 15K, 20K, 5M, 10M, 15M, 20M, 50K, 50M, 100K, and 100M distances. The event features both shorter and ultra-distance races, catering to runners of various levels.

The course location is at 21880 Maramec Spring Drive, set in a scenic terrain area. The event atmosphere is designed to accommodate a large variety of runners, with multiple race distances starting simultaneously. It provides a challenging and diverse running experience in a natural setting. Visit the organization's website for the most recent information.

Race information

100 mi
100m
100 km
100k
50 mi
50m
50 km
50k
20 mi
20m
15 mi
15m
20 km
20k
10 mi
10m
15 km
15k
10 km
10k
5 mi
5 km
Visit the organization's website for the most recent information.
Trail runs nearby

The Ultra Sweaty Santa is an annual endurance running event held in Devils Elbow, Missouri, celebrating Christmas in July with a 6-hour race on a shaded 6-mile crushed gravel loop alongside the Big Piney River near Old Route 66. Participants can run for 30 minutes, 3 hours, or the full 6 hours, with..

The 3 Legged Monster Race, held in the Mark Twain National Forest near Steelville and Leasburg, Missouri, is a unique relay event featuring running, mountain biking, and paddling legs for teams of two. The race showcases the scenic Ozark Trail, with running through hardwood forests and bluff overloo..

The Lion King Backyard Ultra is an ultramarathon held at Lions Club Park in Rolla, Missouri. This unique race features a 4.167-mile loop that runners must complete every hour, with the course transitioning from a scenic dirt trail through mature forests and cedar groves by day to a flat, paved trail..

The Ozark Trail 100 Mile Endurance Run is a challenging ultra-running event held in Steelville, Missouri, traversing 101 miles of the pristine Ozark Trail through Mark Twain National Forest. Celebrating its 17th year, the race features nearly continuous single-track trails with about 12,000 feet of..