Iron Heart
Saint James, United States • 13 Feb 2026
Event overview
The Iron Heart is a trail running event held around Valentine’s Day at Maramec Spring Park in St. James, Missouri. The venue for race operations is the Massey Hill Shelter at 21880 Maramec Spring Drive. The event offers multiple distance options on established park trails and includes solo and relay formats as well as ultra-distance options.
Distances
- 100 Mile
- 100K
- 50 Mile
- 50K
- 20 Mile
- 15 Mile
- 20K
- 10 Mile
- 15K
- 10K
- 5 Mile
- 5K
Course and race details
The course uses two named trails: Leatherbritches Trail (1.8 miles) and BallHooter Trail (3.2 miles; about 246 ft elevation gain). An aid station is located at the changeover between the two trails and is stocked with electrolyte drink, water, and hot quesadillas. Pacers are permitted only for the 100 Mile and 100K distances under specified rules; pacers must check in and pick up a pacer bib. No pacers, including cyclists, are allowed for other distances.
Logistics and services
Packet pickup and a pre-race pasta meal are organized at Massey Hill Shelter (pasta dinner requires RSVP). Camping is allowed in the parking lot with no hookups; the park also offers non-electric, electric, and full-hookup sites with published per-night fees and additional-person charges. Awards include overall male and female awards for each distance and custom belt buckles or bags for specified ultra finishers. Spectators and well-behaved pets are permitted at the main aid station area. Visit the organization's website for the most recent information.