When is Iron Heart Ultra?

Iron Heart Ultra takes place on Feb 13, 2026. This race has already occurred.

Where is Iron Heart Ultra located?

Iron Heart Ultra is held in St. James, Missouri, United States.

What distances are available at Iron Heart Ultra?

Iron Heart Ultra offers the following distances: 100M, 100K, 50M, 50K, 20M, 15M, 20K, 10M, 15K, 10K, 5M, 5K.

How do I register for Iron Heart Ultra?

You can register for Iron Heart Ultra through the official registration page.

What is the typical weather for Iron Heart Ultra?

Based on historical data, you can expect temperatures between 24°F and 44°F on race day. There's approximately a 11% chance of precipitation.

Iron Heart Ultra (5K-100M) - Feb 13, 2026 | St. James, MO

Embark on a truly unique Valentine's weekend challenge at the Iron Heart Ultra, set for February 13-14, 2026, in the scenic Maramec Spring Park of St. James, Missouri. This "runner-first" trail race, renowned for its welcoming, low-pressure atmosphere and strong sense of camaraderie, offers an extensive range of distances from a 5K to a formidable 100-mile ultra, ensuring a challenge for every heart and stride. Whether you're chasing your first trail finish or aiming for another ultra buckle, the Iron Heart provides the perfect opportunity to push your limits amidst the picturesque Ozark trails.

The course is a moderately challenging, multiple-loop design that guides runners through technical singletrack dirt trails, featuring roots, rocks, and ruts. You'll traverse two beautiful and historic paths: the 1.8-mile Leatherbritches Trail, winding through pine and oak/hickory forests with views of the historic Maramec Iron Works mine pit, and the 3.2-mile BallHooter Trail, boasting approximately 246 feet of elevation gain per loop. The start and finish hub at Massey Hill Shelter in Maramec Spring Park is also where you'll find packet pickup and a pre-race pasta dinner. Runners can anticipate typical race day conditions with highs around 44°F and lows near 24°F, with only an 11% chance of precipitation, making for brisk and invigorating winter running.

What truly sets the Iron Heart Ultra apart is its unwavering support system and vibrant atmosphere. A well-stocked central aid station, strategically located at the BallHooter/Leatherbritches changeover, ensures runners are consistently fueled with water, electrolyte drinks, and the race's "famous hot quesadillas." The multi-loop format means you're never truly alone, frequently returning to the main aid station and the supportive energy of fellow runners and volunteers. This unique winter trail running event emphasizes honest miles, real trails, and the shared experience of endurance, making it a truly unforgettable journey in the heart of the Ozarks.