Point-to-loop-to-point course on the Ice Age Trail and connecting trails, run as two consecutive out-and-back sections from the Nordic Trailhead: north to a turnaround near Scuppernong and back (0 to 63.9 mi, shared with the 100K), then south to a turnaround at Rice Lake and back (63.9 to 100.5 mi, shared with the 38 Mile Fun Run). About 80% wooded singletrack with some prairie/marsh sections; described by the race as "a roller coaster of hills, with rocks and roots scattered about to various degrees." A Western States 100 qualifier.
Total elevation gain is published as approximately 8,800 ft (course-description page); a 2021 third-party race report instead states 9,500 ft of gain for the same course -- both recorded, not reconciled. Course distance is also inconsistent across the race's own pages: the operational aid-station/mileage spreadsheet totals 100.5 mi, the aid-stations page's drop-bag note says Nordic is passed at "Mile 0, 63.9 and 100.6" (100.6, not 100.5), and the official course GPX (a 2021 recording, see gpx notes) measures 99.61 mi. The 100.5 mi chart figure is used as distance_miles since it is the race's own operational document; the others are noted here rather than resolved.
A 100-mile (with 100K, 50K and 38-mile companion distances) trail race entirely on the Ice Age National Scenic Trail and connecting trails in the Kettle Moraine State Forest's Southern Unit, run as two out-and-back sections from the Nordic Trailhead near Whitewater/La Grange, Wisconsin. A Western States 100 qualifier and part of the Midwest Grand Slam of Ultra-running.
Started in 1996 by Kevin and Kris Setnes, who race-directed for 6 years. Tim "Timo" Yanacheck and Jason Dorgan then co-RD'd until 2018. Michele Hartwig of Ornery Mule Racing has directed the race since. The Wisconsin DNR asked the race to stop routing through the Emma Carlin trailhead starting in 2020, and the course has been adjusted since (a shooting-range-adjacent McMiller Sports Center section and an Eagle Horse Trail sandy section were both new as of the 2021 running).
| Mile | Station | Cutoff | Crew | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 | Nordic | ? | ● | ● | ? | ? | 5.10 |
| 5.10 | Tamarack | ? | · | · | ? | ? | 2.30 |
| 7.40 | Bluff | ? | · | · | ? | ? | 3.80 |
| 11.20 | New North Horseriders Station | 11:00pm | · | · | ? | ? | 4.30 |
| 15.50 | Natalie's 8RUN5 Station | ? | · | · | ? | ? | 4.00 |
| 19.50 | McMiller | ? | ● | ● | ? | ? | 4.30 |
| 23.80 | Wilton Road | ? | · | · | ? | ? | 3.30 |
| 27.10 | Hwy 67 | ? | ● | ● | ? | ? | 2.30 |
| 29.40 | Hwy ZZ | ? | ● | · | ? | ? | 4.90 |
| 34.30 | Scuppernong | ? | ● | · | ? | ? | 0.20 |
| 34.50 | Hwy ZZ | ? | ● | · | ? | ? | 2.30 |
| 36.80 | Hwy 67 | ? | ● | ● | ? | ? | 3.30 |
| 40.10 | Wilton Road | ? | · | · | ? | ? | 4.30 |
| 44.40 | McMiller | ? | ● | ● | ? | ? | 4.00 |
| 48.40 | Natalie's New Station | ? | · | · | ? | ? | 4.30 |
| 52.70 | New North Horseriders Station | ? | · | · | ? | ? | 3.80 |
| 56.50 | Bluff | ? | · | · | ? | ? | 2.30 |
| 58.80 | Tamarack | ? | · | · | ? | ? | 5.10 |
| 63.90 | Nordic | 12:30am | ● | ● | ? | ? | 5.10 |
| 69.00 | Tamarack | ? | · | · | ? | ? | 2.30 |
| 71.30 | Bluff | ? | · | · | ? | ? | 2.50 |
| 73.80 | Duffin Road | ? | · | · | ? | ? | 4.10 |
| 77.90 | Hwy 12 | ? | ● | ● | ? | ? | 4.30 |
| 82.20 | Rice Lake | 6:30am | ● | · | ? | ? | 4.30 |
| 86.50 | Hwy 12 | ? | ● | ● | ? | ? | 4.10 |
| 90.60 | Duffin Road | ? | · | · | ? | ? | 2.50 |
| 93.10 | Bluff | 10:00am | ● | · | ? | ? | 2.30 |
| 95.40 | Tamarack | ? | · | · | ? | ? | 5.10 |
| 100.50 | Nordic | ? | ● | ● | ? | ? | ? |
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