The Boulder Field Ultra is a challenging trail race that takes runners through Hickory Run State Park in Jim Thorpe, Pennsylvania. The course is considered to be of a mid-level difficulty and is well-known for two particularly tough sections: a rugged one-mile segment called the "Shades of Death Trail" and a difficult boulder field crossing. Participants can test their endurance on three different distances: an 18-mile trail run, a 50K (31-mile) ultra run, or a 100K (62-mile) ultra run, which consists of two laps of the 50K course. The event's various distances and generous time limits also make it friendly to hikers.
Races
100 km
18 miles
Race Date:
13 September, 2025
The Boulder Field Ultra 100K is a demanding trail running event held at Hickory Run State Park in Jim Thorpe, Pennsylvania. This challenging race consists of two laps of a 50K course, with runners navigating difficult terrain, including a boulder field crossing and the "Shades of Death Trail."
Weather based on historical averages.
FAQs
What is the Boulder Field Ultra 100K?
How long is the Boulder Field Ultra 100K?
Where does the Boulder Field Ultra 100K take place?
What is the elevation gain of the Boulder Field Ultra 100K?
How can I prepare for the Boulder Field Ultra 100K?
How do I choose the right training plan for the Boulder Field Ultra 100K?
The Boulder Field Ultra 100K is a demanding trail running event held at Hickory Run State Park in Jim Thorpe, Pennsylvania. This challenging race consists of two laps of a 50K course, with runners navigating difficult terrain, including a boulder field crossing and the "Shades of Death Trail."
The Boulder Field Ultra 100K is 100km long.
The Boulder Field Ultra 100K takes place in Jim Thorpe, Pennsylvania, United States of America.
The Boulder Field Ultra 100K elevation gain is 2438 metres, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Boulder Field Ultra 100K?
The Boulder Field Ultra 100K is a demanding trail running event held at Hickory Run State Park in Jim Thorpe, Pennsylvania. This challenging race consists of two laps of a 50K course, with runners navigating difficult terrain, including a boulder field crossing and the "Shades of Death Trail."
How long is the Boulder Field Ultra 100K?
The Boulder Field Ultra 100K is 100km long.
Where does the Boulder Field Ultra 100K take place?
The Boulder Field Ultra 100K takes place in Jim Thorpe, Pennsylvania, United States of America.
What is the elevation gain of the Boulder Field Ultra 100K?
The Boulder Field Ultra 100K elevation gain is 2438 metres, which Runna classifies as a Hilly race.
How can I prepare for the Boulder Field Ultra 100K?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Boulder Field Ultra 100K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Nature
Park
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Boulder Field Ultra or Uberendurancesports. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Boulder Field Ultra website.
