A single short loop near the start/finish area, separate from the 20-mile ultra loop. UltraSignup also lists a "5k YOUTH" category at the same distance/time, not filed here as a separate course.
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 | ? | ● | ? | · | ? | 3.10 |
| 3.10 | Ireland Shelter | ? | ● | ? | · | ? | ? |
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