Set in the scenic Endless Mountains of Pennsylvania, the Worlds End Ultramarathon is a premier trail running event known for its demanding courses and breathtaking vistas. The 100K race covers approximately 63.8 miles with an elevation gain of 12,395 feet, while the 50K race spans about 31.4 miles with a gain of 5,915 feet. Both races start and finish at the Cliff Pavilion in Worlds End State Park and traverse predominantly single-track trails featuring waterfalls, rock formations, and panoramic views. The event is part of the Pennsylvania Triple Crown of Mountain Running and serves as a qualifier for the Western States 100. Participants can expect well-stocked aid stations, with the 100K offering 13 stations (some crew-accessible) and the 50K providing 6 stations. Post-race festivities include a variety of food options to cater to different dietary preferences.
Races
The Worlds End 100K is a 63.8-mile (102.7 km) single-loop trail ultramarathon featuring approximately 12,395 feet (3,778 meters) of elevation gain. Traversing 95% rugged single-track and double-track trails through the Endless Mountains, this challenging course offers scenic vistas, waterfalls, and technical terrain within Loyalsock State Forest and Worlds End State Park. 
The Worlds End 50K is a 31.4-mile (50.5 km) single-loop trail ultramarathon with around 5,915 feet (1,803 meters) of elevation gain. Covering 98% single-track and double-track trails, the race navigates through the scenic and rugged landscapes of Loyalsock State Forest and Worlds End State Park, featuring numerous climbs, waterfalls, and panoramic views. 
Weather based on historical averages.
FAQs
What is the Worlds End Ultra 100k?
How long is the Worlds End Ultra 100k?
Where does the Worlds End Ultra 100k take place?
What is the elevation gain of the Worlds End Ultra 100k?
How can I prepare for the Worlds End Ultra 100k?
How do I choose the right training plan for the Worlds End Ultra 100k?
The Worlds End 100K is a 63.8-mile (102.7 km) single-loop trail ultramarathon featuring approximately 12,395 feet (3,778 meters) of elevation gain. Traversing 95% rugged single-track and double-track trails through the Endless Mountains, this challenging course offers scenic vistas, waterfalls, and technical terrain within Loyalsock State Forest and Worlds End State Park. 
The Worlds End Ultra 100k is 102km long.
The Worlds End Ultra 100k takes place in Forksville, PA, USA.
The Worlds End Ultra 100k elevation gain is 3778 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized 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 personalized 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 Worlds End Ultra 100k?
The Worlds End 100K is a 63.8-mile (102.7 km) single-loop trail ultramarathon featuring approximately 12,395 feet (3,778 meters) of elevation gain. Traversing 95% rugged single-track and double-track trails through the Endless Mountains, this challenging course offers scenic vistas, waterfalls, and technical terrain within Loyalsock State Forest and Worlds End State Park. 
How long is the Worlds End Ultra 100k?
The Worlds End Ultra 100k is 102km long.
Where does the Worlds End Ultra 100k take place?
The Worlds End Ultra 100k takes place in Forksville, PA, USA.
What is the elevation gain of the Worlds End Ultra 100k?
The Worlds End Ultra 100k elevation gain is 3778 meters, which Runna classifies as a Hilly race.
How can I prepare for the Worlds End Ultra 100k?
The best way to train for the next race is to use a personalized 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 Worlds End Ultra 100k?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Worlds End Ultra 50k?
How long is the Worlds End Ultra 50k?
Where does the Worlds End Ultra 50k take place?
What is the elevation gain of the Worlds End Ultra 50k?
How can I prepare for the Worlds End Ultra 50k?
How do I choose the right training plan for the Worlds End Ultra 50k?
The Worlds End 50K is a 31.4-mile (50.5 km) single-loop trail ultramarathon with around 5,915 feet (1,803 meters) of elevation gain. Covering 98% single-track and double-track trails, the race navigates through the scenic and rugged landscapes of Loyalsock State Forest and Worlds End State Park, featuring numerous climbs, waterfalls, and panoramic views. 
The Worlds End Ultra 50k is 50km long.
The Worlds End Ultra 50k takes place in Forksville, PA, USA.
The Worlds End Ultra 50k elevation gain is 1803 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized 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 personalized 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 Worlds End Ultra 50k?
The Worlds End 50K is a 31.4-mile (50.5 km) single-loop trail ultramarathon with around 5,915 feet (1,803 meters) of elevation gain. Covering 98% single-track and double-track trails, the race navigates through the scenic and rugged landscapes of Loyalsock State Forest and Worlds End State Park, featuring numerous climbs, waterfalls, and panoramic views. 
How long is the Worlds End Ultra 50k?
The Worlds End Ultra 50k is 50km long.
Where does the Worlds End Ultra 50k take place?
The Worlds End Ultra 50k takes place in Forksville, PA, USA.
What is the elevation gain of the Worlds End Ultra 50k?
The Worlds End Ultra 50k elevation gain is 1803 meters, which Runna classifies as a Hilly race.
How can I prepare for the Worlds End Ultra 50k?
The best way to train for the next race is to use a personalized 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 Worlds End Ultra 50k?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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!
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This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Worlds End Ultramarathon 2025 or Worlds End Ultramarathon. 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 Worlds End Ultramarathon 2025 website.