Iron Heart Ultra
About the race
Iron Heart Ultra Race takes place at Maramec Spring Park, Massey Hill Shelter, in St. James, Missouri, over Valentine's Day weekend.
The race delivers endurance, challenge, and camaraderie in the heart of the Ozarks. Whether you're tackling your first trail race or chasing your next ultra buckle, there's a distance for you.
Aid stations
One water station will be located on the course. A fully stocked aid station will be available throughout the event.
Camping, spectators and withdrawal
Overnight parking lot camping is welcome. No electrical or water hookups are available. Spectators and well-behaved pets on a leash are welcome.
If you decide to withdraw from the race, please notify race officials immediately for your safety.
Race date and location
Date: Saturday, February 13, 2027
Location: Maramec Spring Park, Massey Hill Shelter
Address: 21880 Maramec Spring Drive, St. James, MO 65559
Awards
Overall Male and Overall Female awards will be presented in every race distance.
Custom Iron Heart belt buckles will be awarded to all finishers of the 100 Mile, 100K, 50 Mile, and 50K events.
Pacer policy
- 100 Mile participants may have a pacer after Mile 50.
- 100K participants may have a pacer beginning at Mile 52 during the final lap.
- All pacers must check in with race officials, wear an official pacer bib, and remain with their assigned runner.
- Pacers are not permitted in any other race distance.
Adaptive athlete policy
Our commitment
We believe running and walking events should be welcoming and accessible to everyone. Our goal is to provide a safe, enjoyable, and competitive experience for athletes of all abilities while maintaining the integrity of the event for every participant.
We encourage individuals with disabilities to participate and will make reasonable accommodations whenever possible. Participants requiring accommodations are encouraged to contact the Race Director at least 30 days prior to race day whenever possible.
Competitive adaptive divisions
Visually Impaired & Ambulatory Adaptive
Our goal is simple: Everyone deserves the opportunity to cross the finish line.
The course
100 Miles
100K
50 Miles
50K
20K
10K
5K
Participants run on two trails within Maramec Spring Park. The Leatherbritches Trail is scenic forest single track with views of the historic Maramec Iron Works mine pit. The BallHooter Trail is moderately challenging terrain with about 246 feet of elevation gain per loop.
Course details
Participants will experience two beautiful trails within Maramec Spring Park.
- Leatherbritches Trail: Approximately 1.5 miles of scenic forest single track featuring views of the historic Maramec Iron Works mine pit.
- BallHooter Trail: Approximately 3.4 miles of moderately challenging terrain with approximately 246 feet of elevation gain per loop.
Location
City insight: St James
St James is a community in Missouri, USA. The humid continental climate has hot summers and cold winters, so spring and autumn are the best seasons to race.
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