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Verified Sun, 11 Oct 2026
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USARunningTrail100K · 100 km / 62.1 mi100mi · 160.9 km / 100.0 mi10K · 10 km / 6.2 mi50K · 50 km / 31.1 mi50mi · 80.5 km / 50.0 mi5K · 5 km / 3.1 mi
Iron Heart Ultra
St. James, Missouri, Maramec Spring Park, Massey Hill Shelter, 21880 Maramec Spring Drive · USA
Next race day
Sat, 13 Feb 2027
6 distances · see start times below
About Iron Heart Ultra
Iron Heart Ultra is a running event in St. James, Missouri, Maramec Spring Park, Massey Hill Shelter, 21880 Maramec Spring Drive, United States. Recorded disciplines include 100K, 100mi, 10K, 50K, 50mi, 5K. The listed surface is trail. The listed organiser is Split Second Timing. The next listed date is 13 February 2027. Check the organiser's information for entry and race-day arrangements.
Dates, starts & entry
Times are local to the race. Select the entry route for your distance.
- Official entry
10K · 10 km / 6.2 mi
Sat, 13 Feb 2027
Starts 09:30 CST
Entries open
Competitive Saturday programme. Check the organiser’s current course and pacer instructions before race day.
Edition source - Official entry
5K · 5 km / 3.1 mi
Sat, 13 Feb 2027
Starts 09:30 CST
Entries open
Competitive Saturday programme. Check the organiser’s current course and pacer instructions before race day.
Edition source - Official entry
50K · 50 km / 31.1 mi
Sat, 13 Feb 2027
Starts 07:00 CST
Entries open
Competitive Saturday programme. Check the organiser’s current course and pacer instructions before race day.
Edition source - Official entry
50mi · 80.5 km / 50.0 mi
Sat, 13 Feb 2027
Starts 07:00 CST
Entries open
Competitive Saturday programme. Check the organiser’s current course and pacer instructions before race day.
Edition source - Official entry
100K · 100 km / 62.1 mi
Sat, 13 Feb 2027
Starts 07:00 CST
Entries open
Competitive Saturday programme. Check the organiser’s current course and pacer instructions before race day.
Edition source - Official entry
100mi · 160.9 km / 100.0 mi
Sat, 13 Feb 2027
Starts 07:00 CST
Entries open
Competitive Saturday programme. Check the organiser’s current course and pacer instructions before race day.
Edition source
Location & race day
Listed venue / area
Maramec Spring Park, Massey Hill Shelter, 21880 Maramec Spring Drive, St. James, MissouriUSA
Confirm the exact start line, parking and arrival instructions with the organiser. A listed town or postcode may cover a wider area.
About the race
Trail ultras and shorter races at Maramec Spring Park.
- Surface:
- Trail
- Organiser:
- Split Second Timing
Ways to enter
Compare the listed booking routes. Verified links show when they were checked.
Sat, 13 Feb 2027
Third-party prices, booking fees, allocations and refund terms can differ. Confirm the final details with the provider before paying.
Results
Public-figure or athlete-approved ATHRECS results, plus verified organiser links.
No verified results links have been added yet.
Past races
None listed yet.
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