Thank you for the video Pat Durante. Over the last 15 years, Uberendurancesports has built a reputation for putting on well organized running events, many of them trail runs that are also beginner friendly. The Boulderfield 100K/50K/18M was created to offer a new, more challenging race to our runners. We do believe that every properly trained runner can tackle this challenge but it will be more difficult than our other trail races. Elevation is estimated to be about 4000ft per 50k loop. In addition to the rolling character of the course, you will encounter a boulder field crossing and a very rugged 1 mile trail section called the Shades of Death Trail. But it will not be quite as difficult as many of the races in the upstate PA area, so I would think it would be fair to describe this as a mid level difficulty course. There is a 16 hour time limit for the 100k & 14 hour for the 50k, which will make the shorter race hiker friendly. If this sounds like your kind of fun, please join us.
100 km Ultra Run 50K Ultra Run and Mega Hike 18M Run/Hike
Fri Sept 11th 4:00PM - 8:00PM & Sat Sept 12th 4:00AM - 7:30AM At the pavillion next to Sand Spring Lake , Hickory Run State Park approx address: Pavillion Rd, Albrightsville, PA 18210
Hickory Run State Park, Sand Spring Lake approx address: Pavillion Rd, Albrightsville, PA 18210
50K: 85$ till 5/15 $89 till 8/15 $95 after 100K $99 till 5/15 $109 till 8/15 and $115 after 18M $59 till 5/15 $65 till 8/15 and $69 after
Till 8/15: Mail us a stamped self-addressed envelope to receive a refund minus $10 to: UES, c/o Boulderfield, 2137 Old Lancaster Pike, Reinholds, PA 17569 after 8/15: all entries are final unless there is a waiting list. No unauthorized bib transfers, please contact Rd at Stephanweiss@comcast.net to find out if and how you can transfer your bib. No refunds if event gets cancelled or postponed due to weather, acts of god or restrictions put in place by the government. Runners can either run on the new date or get rolled over into the following year.
All Runners will receive a finisher award (tbd) Top 3 overall , Age groups Top 5 : 18-39, 40-49, 50-59 , 60-69 & 70+
All runners have to finish before 9PM, 15.5 min per mile pace for the 100k. This also makes the 50k very hiker friendly. You have 14 hours for 31 Miles.
Aid Stations (approx): Mile 5, 10, 12,19,25.5 (50K and 100K) 100K: Mile: 31,36,41,43,50,55.5 We highly recommend carrying at least 16oz of fluid to keep hydrated between aidstations. Gatorade and water will be available at all the aidstation. There will be the usual snacks and carbs to keep you fueled at the race (bring your own brand of gels, if you rely on them). All aidstations are staffed by experienced ultra runners,
Entire course is within Hickory Run State Park. Course is a figure 8 shaped 50K loop, 100k runners will run the 50k course twice. 90% of the course is a mix of single track hiking trails and some wider multi-use trails, only about 1 mile of (gravel)road. Most of the trails are not considered super difficult by trail running standards, but especially the Shades of Death Trail section ( about 1 mile) and the boulder field crossing ( less then 1 mile) are very difficult.
Sep 12, 2026
Distance — 100K
Type — Running
05:00
$109.00
Sep 12, 2026
Distance — 50K
Type — Running
07:00
$89.00
Sep 12, 2026
Distance — 29K
Type — Running
07:30
$65.00
Learn more about the host city, Jim Thorpe.
Jim Thorpe is a borough in the Coal Region, near Lehighton, Allentown and the Lehigh Valley, in the U.S. state of Pennsylvania.
Read more launchWatch highlights and course previews from previous years.
All-time top performances and historical records for Boulder Field 100.
| Place | Name | Year | Time | |
|---|---|---|---|---|
| 🥇 | Sarah Colwell | '16 | 11:31:33 | |
| 🥈 | Melinda Coen | '21 | 12:05:50 | |
| 🥉 | Laura Laidacker | '20 | 12:40:43 | |
| 4 | Jessica Snyder | '25 | 12:50:37 | |
| 5 | Kimberly Drozda | '21 | 12:51:54 | |
| 6 | Helene Strutko | '17 | 12:56:32 | |
| 7 | Joni Gerken | '25 | 12:56:35 | |
| 8 | Angela Capece | '17 | 12:58:22 | |
| 9 | Carol Pelletier | '25 | 13:01:08 | |
| 10 | Lauren Longfield | '19 | 13:19:02 |
Read what other athletes have to say about their experience at the Boulder Field 100.
Be the first to share your experience with the community!
Explore other exciting events happening in this same region.
Hand-picked events we think you’ll love.
Nov 21, 2026
The RUN Manatee 5k series offers THREE adventures to celebrate ONE community. Participants will discover Manatee County…
Read more
Nov 28, 2026
Join us for the annual Turkey Trails 5k/10k! A fun, Thanksgiving-themed event that is perfect for the whole family.The…
Read more
Dec 13, 2026
Join us for the annual Candy Cane Course 5k/12k! A fun, Christmas-themed event that is perfect for the whole family.Th…
Read more
Mar 21, 2027
WE ARE NOW OFFERING AN AQUABIKE DIVISION! Triathlon Information:Join us for the annual Space Coast Triathlon, held in …
Read more