Boulder Field 100

SEP
12
2026
Trail ultraruns at Hickory Run State Park near Jim Thorpe, PA feature 100K, 50K and 18 mile options on a figure eight 50K loop with single track, a boulder field, and the rugged Shades of Death Trail.
Sat 12 Sep 2026
100 kilometers 50 kilometers 18 miles

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Boulder Field 100, Jim Thorpe PA

Boulder Field 100 is a trail running event held within Hickory Run State Park at Sand Spring Lake. The course is a figure eight shaped 50K loop; 100K runners complete the 50K loop twice. Most of the route follows single-track hiking trails with about one mile of gravel road.

Estimated elevation gain is about 4000 ft per 50K loop. Notable course features include a boulder field crossing (under one mile) and a rugged section called the Shades of Death Trail (about one mile). Aid stations are located at approximate miles 5, 10, 12, 19, 25.5 for the 50K and additional stations for the 100K; Gatorade and water will be available and runners are asked to carry at least 16 oz of fluid between stations.

Distances

  • 100 km Ultra Run
  • 50K Ultra Run and Mega Hike
  • 18M Run/Hike

Time limits are published for the 100K and 50K; the 50K has a 14 hour limit listed. Bib pickup is scheduled at the pavilion next to Sand Spring Lake the day before and the morning of the event. Fees vary by distance and registration date. All finishers receive a finisher award; top overall and age group awards are planned. Registration closes on Mon, Sep 7. Visit the organization's website for the most recent information.

100 km
100k
50 km
50k
18 mi
18m Run/hike