Course map, elevation profile & surface
Fly the course
Follow the route over 3D terrain, mile by mile.
Race-day light
For a 20:05 finish (an estimate) · starting 7:00 AM Jan 2 · headlamp mi 54–the finish. Dark means the sun below civil twilight.
Climbs
biggest firstElevation gain, measured two ways
| Source | Gain | vs lidar |
|---|---|---|
| Course file (GPX) | 842ft | -44% |
| USGS lidar, 1 m | 1,515ft | reference |
They differ because a GPS file picks up noise on every wiggle and often takes its heights from a coarse terrain model, while lidar maps the ground itself to about a metre. We sampled this route every 98 ft against USGS 3DEP and counted each rise of 10 ft or more, on Oct 23, 2026. The planner still uses the course file.
Aid stations as published on the course file
| Aid station | Mile | km |
|---|---|---|
| 100 Miler & 100K Start Line/Aid Station | 0.0 | 0.0 |
| A 67 Water Station | 6.7 | 10.8 |
| A DeKalb Aid Station (Mile 12.9) | 12.9 | 20.7 |
| A Lighthouse Water Station | 17.1 | 27.5 |
| A Avery Aid Station (Mile 21.9) | 21.9 | 35.3 |
| A Section 1 END/Section 2 BEGIN | 22.6 | 36.3 |
| A 4310 Water Station | 26.5 | 42.7 |
| A Annona Aid Station (Mile 31.4) | 31.4 | 50.5 |
| A Young Creek Water Station | 35.7 | 57.4 |
| A Clarksville Aid Station (Mile 39.6) | 39.6 | 63.7 |
| A Section 2 END/Section 3 BEGIN | 40.2 | 64.7 |
| A 2123 Water Station | 43.9 | 70.6 |
| A 2573 Water Station | 49.3 | 79.3 |
| A Detroit Aid Station (Mile 53.8) | 53.7 | 86.5 |
| A Blossom Water Station | 59.8 | 96.2 |
| A Section 3 END/Section 4 BEGIN | 64.5 | 103.8 |
| A Reno Aid Station (Mile 64.6) | 64.5 | 103.8 |
| A Paris Water Station | 69.3 | 111.6 |
| A Paris Aid Station (Mile 73.7 & 94.0) | 73.6 | 118.4 |
| A Ambia Water Station | 77.9 | 125.4 |
| A Roxton Aid Station (Mile 83.8) | 83.8 | 134.8 |
| A Roxton 100 Miler & 50K Turnaround | 83.8 | 134.8 |
| A Section 4 END/Section 5 Begin | 92.9 | 149.5 |
| Finish Line | 100.1 | 161.2 |
Badge colours match the markers on the map above — always confirm locations and cutoffs with the race organizer.
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Conditions typical race-day weather for Jan 2 at the start
Typical = the median of 2016–2025 for Jan 2 ±3 days at the start line; a wet day has 1 mm of rain or more. Historical weather from Open-Meteo.
Race almanac the sky on race day
Next race day Sat, Jan 2, 2027 · 7:00 AM start
First and last light are civil twilight, the sun 6° below the horizon. The moon is lit as at midnight after the start; headlamp hours count a typical finish from the start while the sun is below civil twilight. Worked out for the start line.
Reviews what runners who have been there say
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About this course
IRON HORSE — 2027 covers 100.1 mi (161.2 km) with 842 ft of elevation gain through Texas, United States. That is about 8 ft per mile of climbing, and 673 ft of descent. The course tops out at 587 ft and bottoms out at 358 ft. The surface is 56% gravel, 23% paved and 18% trail. There are 22 aid stations on course; the longest stretch between aid is 9.1 mi. Race day is January 2, 2027, starting at 7:00 AM; the sun rises at 7:23 AM and sets at 5:22 PM. Typical race-day weather at the start: a high of 54°F and a low of 37°F, with a 24% chance of a wet day. The interactive map above shows the full route with its elevation profile and aid stations, built from the course's GPS file.
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Course history
- Jul 26, 2026Added to the catalog
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