Three laps of the same 20-mile loop used by the 100 Mile and 20 Miler, plus a 2-mile finishing loop, starting and finishing at the Ireland Shelter. About 95% singletrack.
Same loop-elevation caveat as the 100 Mile course: RD-published gain is per 20-mile loop ("roughly 3200 feet", revised to "3100-3200 feet" after a course tweak), not per course, and the first lap's Sugarloaf Mt climb is bypassed on laps 2-3, so course-total elevation is not simply 3x the loop figure. The published "100k" distance is nominal; three 20-mile loops plus a 2-mile finishing loop is 62 miles (about 99.8 km), which the loop_distance_miles field cannot fully express since the finishing loop is a different, shorter 2-mile segment, not a fourth full loop.
A trail race at Great Seal State Park outside Chillicothe, Ohio, on a hilly 20-mile loop that is roughly 95% singletrack. As of the 2026-2027 cycle it offers four distances built on repeats of that loop: 100 Mile (5 laps), 100K (3 laps plus a 2-mile finishing loop), 20 Miler (1 lap) and a 5K on a separate short loop. Earlier editions (2023-2025) were run as 50K/25K/5K instead.
RD Chris Stangle ran his first ultra in Great Seal State Park and later became the first person to host an ultra there in several years, after a long gap with no ultras in the park at all. He trained in the park daily before moving to Florida, and had his first date with his now-wife and co-RD, Ivi Stangle, there. The race has run each year since 2023 (per UltraSignup's published results history: 2023, 2024, 2025, 2026). It began as a 50K/25K/5K event; the 2026 and 2027 editions switched to a 100 Mile / 100K / 20 Miler / 5K format, the 100-mile distance having been part of Chris Stangle's plan for the race from early on.
| Mile | Station | Cutoff | Crew | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 | Ireland Shelter | ? | ● | ● | ● | ? | 3.60 |
| 3.60 | Rocky Road | ? | · | ● | · | ? | 4.90 |
| 8.50 | Lick Run | ? | ● | ● | ● | ? | 5.80 |
| 14.30 | Lick Run | ? | ● | ● | ● | ? | 3.00 |
| 17.30 | Rocky Road | ? | · | ● | · | ? | 2.70 |
| 20.00 | Ireland Shelter | ? | ● | ● | ● | ? | 3.60 |
| 23.60 | Rocky Road | ? | · | ● | · | ? | 4.90 |
| 28.50 | Lick Run | ? | ● | ● | ● | ? | 5.80 |
| 34.30 | Lick Run | ? | ● | ● | ● | ? | 3.00 |
| 37.30 | Rocky Road | ? | · | ● | · | ? | 2.70 |
| 40.00 | Ireland Shelter | ? | ● | ● | ● | ? | 3.60 |
| 43.60 | Rocky Road | ? | · | ● | · | ? | 4.90 |
| 48.50 | Lick Run | ? | ● | ● | ● | ? | 5.80 |
| 54.30 | Lick Run | ? | ● | ● | ● | ? | 3.00 |
| 57.30 | Rocky Road | ? | · | ● | · | ? | 2.70 |
| 60.00 | Ireland Shelter | ? | ● | ● | ● | ? | 2.00 |
| 62.00 | Ireland Shelter | ? | ● | ● | · | ? | ? |
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