Start at Asaph: out-and-back to Wellsboro Junction (~6 mi each way), back to Asaph, then out-and-back to Blackwell (~19 mi each way) -- the first half of the 100 Mile course.
Identical route/surface/grade to the first half of the 100 Mile course. Overall time limit is not published as a headline number for this distance; derived here from the 8:00 am Saturday start to the published noon-Sunday course closure (28 hours) -- flagged as inferred, not stated outright by the race.
An out-and-back ultra on the Pine Creek Rail Trail through the Pine Creek Gorge (the "Grand Canyon of Pennsylvania") near Wellsboro, PA, run concurrently at four distances (100 Mile, 100K, 50 Mile, Marathon) from a shared start/finish at Asaph. The trail is finely crushed limestone, 20 feet wide, closed to motor vehicles, and loses only about 900 feet over 63 miles (a 2% grade) -- flat enough that the race markets itself as beginner-friendly and a common choice for a first 100-miler.
First run at least by 2011 (UltraSignup results are on file back to 2011). The 100-mile course was originally longer: a 2013 crew report describes the out-and-back continuing south past Blackwell through Slate Run and Cedar Run aid stations to a turnaround near the village of Cammal (Blackwell was passed at mile 79.1, not the turnaround). By 2016 (per an archived course-map image) and continuing through the current 2026 listing, the course has been shortened to turn around AT Blackwell, with the Slate Run/Cedar Run/Cammal stations no longer part of the race.
| Mile | Station | Cutoff | Crew | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 | Asaph (USGS Building) | ? | ● | ● | ? | ? | 6.00 |
| 6.00 | Wellsboro Junction | ? | ● | ? | ● | ? | 6.00 |
| 12.00 | Asaph (USGS Building) | ? | ● | · | ? | ? | 3.00 |
| 15.00 | Darling Run | ? | ● | ? | ● | ? | 8.00 |
| 23.00 |
Tiadaghton
None · no cell service
|
? | · | · | ? | ? | 7.50 |
| 30.50 | Blackwell | ? | ● | ● | ● | ? | 7.50 |
| 38.00 |
Tiadaghton
None · no cell service
|
? | · | · | ? | ? | 8.00 |
| 46.00 | Darling Run | ? | ● | ? | ● | ? | 4.00 |
| 50.00 | Asaph (USGS Building) | ? | ● | ? | ? | ? | ? |
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