100 mi100K50 mi50K20K10K5K

Iron Heart Ultra

Saturday, February 13, 2027ST JAMES, Missouri

At a glance

Aid stations, cutoffs and pacing in one plan, with the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.

Race day

Feb 13, 2027

130d

Registration openings and major changes, like a new date or a cancellation.

Can't race, or need an entry? Post it here so nobody has to ask if it's still available.

Last Chance Ultra
Dec 5Springfield, MO100 mi, 100K +2
50 Mile, 10 weeks before race day, 103 mi away, registration open
Spirit of Syllamo
Dec 12Norfork, AR100 mi, 38 mi
38 mi, 9 weeks before race day, 142 mi away, registration open
The Next Loop Endurance Weekend | 01/01/27
Jan 1, 2027St. Louis, MO48 hr, 100 mi +3
50 Mile, 6 weeks before race day, 72 mi away
Creek Trail Crusher
Nov 14Paragould, AR100.01 mi, 50 mi +1
50 Mile, 13 weeks before race day, 143 mi away, registration open

Straight-line distance

The Shippey Endurance Runs
Jan 16, 2027High Ridge, MO100 mi, 100K +2
Also 100 miles, 66 mi from Iron Heart Ultra, registration open
Last Chance Ultra
Dec 5Springfield, MO100 mi, 100K +2
Also 100 miles, 103 mi from Iron Heart Ultra, registration open
Spirit of Syllamo
Dec 12Norfork, AR100 mi, 38 mi
Also 100 miles, 142 mi from Iron Heart Ultra, registration open
Creek Trail Crusher
Nov 14Paragould, AR100.01 mi, 50 mi +1
Also 100 miles, 143 mi from Iron Heart Ultra, registration open

Straight-line distance

Show Me Your Free State Marathon and Ultra
Oct 24St. Joseph, MO100 mi, 50 mi +3
Ozark Trail 100 Mile Endurance Run
Oct 31Steelville, MO100 mi
Last Chance Ultra
Dec 5Springfield, MO100 mi, 100K +2
The Next Loop Endurance Weekend | 01/01/27
Jan 1, 2027St. Louis, MO48 hr, 100 mi +3
The Shippey Endurance Runs
Jan 16, 2027High Ridge, MO100 mi, 100K +2

Lion King Backyard Ultra
Oct 10Rolla, MOBackyard Ultra
Freedom Backyard Ultra Marathon (FBUM 2027)
Jun 5, 2027Bourbon, MOBackyard Ultra
Lake of the Ozarks Endurance Runs
May 1, 2027Kaiser, MO25K
Ozark Foothills Endurance Runs
Apr 9, 2027Wildwood, MO50K
963 Beulah Challenge
Feb 6, 2027Wildwood, MO9 hr, 6 hr +1
Thunder Chicken 100K Stage Races
Apr 30, 2027Wildwood, MO3 days, 21 mi
Wildwood Trail Marathon
Dec 5Wildwood, MOMarathon, Half Marathon +1
Babler Bongo 15K Trail Race/15K RUCK
Oct 24Wildwood, MO15K
Chubb Trail Races
Apr 3, 2027St Louis, MO50K, 25K +1
DeClue Loop Trail Race
Oct 10Wildwood, MO50K, Marathon +2

Race planning

Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.

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