Boulder Field 100
White Haven, United States • 12 Sep 2026
Event overview
The Boulder Field 100 is an ultrarunning event in Jim Thorpe, PA, held within Hickory Run State Park at Sand Spring Lake. Distances offered are:
- 100 km Ultra Run
- 50K Ultra Run and Mega Hike
- 18M Run/Hike
The organizer lists time limits of 16 hours for the 100K and 14 hours for the 50K. All finishers receive a finisher award. Overall awards go to the top three finishers; age-group awards are given to the top five in these ranges: 18-39, 40-49, 50-59, 60-69, 70+.
Course and aid
The course is a figure-8 50K loop; 100K entrants run the loop twice. About 90% of the route is single-track and multi-use trails, with roughly 1 mile of gravel road. Notable sections include a boulder field crossing (less than 1 mile) and the Shades of Death Trail (about 1 mile). Elevation is estimated at about 4000 ft per 50K loop. Approximate aid station locations are at miles 5, 10, 12, 19, 25.5 for the 50K/100K and additional stations for the 100K at miles 31, 36, 41, 43, 50, 55.5. Water and Gatorade will be available; participants are advised to carry at least 16 oz of fluid.
Logistics
Bib pickup is at the pavilion next to Sand Spring Lake, Hickory Run State Park, on the Friday before the event and on race morning. Fees vary by distance and registration date. Registration closes on Mon, Sep 7. Refunds are available with conditions until Aug 15; after Aug 15 entries are final unless a waiting list applies. No refunds for cancellations due to weather or government restrictions. Visit the organization's website for the most recent information.