Registration Date: December 5, 2026
Registration Opens: 6:00PM
Platform: Runsignup
Registration Closes: May 28, 2027
run like there's no tomorrow
worlds end 50k
The course is predominantly rugged single-track that winds it’s way through the Endless Mountains in the Loyalsock State Forest and Worlds End State Park. Your effort will reward you with beautiful overlooks such as Butternut View, High Rock Vista and Canyon Vista – along with spectacular cascades and falls like Alpine Falls and Double Run. You’ll pass many interesting rock formations, take in the tranquility of Sones Pond, and you may even see a bald eagle soar beside you as you traverse the rocky ledge of trail that overhangs the Loyalsock Creek.
This course can be described as “hilly” or “rolling” with it’s steepest sustained climb only being about 1,000 rocky feet. The deceptive part is that there is a never ending supply of shorter climbs that the trail throws at you to give an unexpected overall elevation gain of about 5,900 feet. Combine this with the often rock strewn, technical trail along with the number of times you’ll stop to take in the scenery, and you’ll quickly realize this isn’t a course you’ll try to set any personal records on.
The race was designed around the famed Loyalsock Trail but to complete the loop back to Worlds End State Park, you’ll spend plenty of time exploring side trails of equal beauty. The course runs deep in the Pennsylvania hills with rocky hollows, diverse forests, narrow gorges, and endless views – enough eye candy to keep you busy for your entire run. But don’t linger too long at any one place, you only have 12 hours to complete this race.
Trail Sisters Approved
Worlds End Ultramarathon adheres to the Trail Sisters standards for race events and is committed to a welcoming experience for our women participants.
Qualification Standards
Unlike the Worlds End 100k – we do NOT require any qualifying races to participate in the 50k race.
Be aware though, this race is NOT a beginners-level 50k race since you will need to negotiate rock fields, narrow and uneven terrain, steep climbs, precipitous descents, and even a cliff side trail over flowing water. If you feel up to the task, confident in your ability, and prepare yourself accordingly – please feel free to sign up! There is no age limit for participation, but minors must have a parent present to take responsibility.
Qualification Standards
Unlike the Worlds End 100k – we do NOT require any qualifying races to participate in the 50k race.
Be aware though, this race is NOT a beginners-level 50k race since you will need to negotiate rock fields, narrow and uneven terrain, steep climbs, precipitous descents, and even a cliff side trail over flowing water. If you feel up to the task, confident in your ability, and prepare yourself accordingly – please feel free to sign up! There is no age limit for participation, but minors must have a parent present to take responsibility.
Registration
Registration for the 2027 Worlds End Ultramarathon opens December 5, 2026 at 6:00PM using RUNSIGNUP as our preferred registration platform. The price is $120 + registration fees. We have a 250 person capacity limit and the race registration is first come, first served. There is no qualifying standard for the 50k race that must be met prior to signing up (see above).
Historically, the demand for this race has been extremely high for over 11 years – which means we sell out between 6 to 12 minutes every year. If you do not have a Runsignup account, take a moment prior to registration opening and set up an account. This will ensure you have the best chance of getting into the event.
The wait list opens immediately after the race fills to capacity. While the wait list can be as long as the number of participants in the event, we tend to work our way through a large majority of the names on the list as we draw closer to the event. Don’t be afraid to put your name on the wait list and train like you’re going to race on race day.
Event Information
Event Date: June 5, 2027
Start Time: 7:00AM
Cutoff Time: 7:00PM (12 hours)
Start & Finish Location: Cliff Pavilion at Worlds End State Park in Forskville, PA
The 2027 Worlds End 50k will be held on June 5, 2027, starting and finishing at Worlds End State Park. Parking for the event is located one mile from the park at the Sullivan County Fairgrounds. A shuttle service between the fairgrounds and the park will be provided throughout the day for both runners and crews alike.
Use the buttons below to find out more information:
Event information last updated: 3 June 2026
Refund Policy & Wait List
We believe trail running should be for everyone, no matter your financial background. Our goal is to make sure runners feel supported and empowered to take on this adventure without worrying about breaking the bank. With that spirit in mind, we offer the following refund options:
- We will offer a 100% refund minus processing fees until December 31, no questions asked.
- To keep things fair while still being able to support the volunteers, logistics, and community efforts that bring this race to life, after the initial full refund window we will refund 50% of your entry fee minus any processing fees until April 2.
- Between April 3 and May 21, we will refund 25% of your entry fee minus any processing fees.
- No refunds after May 21.
Please note that registrations can’t be transferred or deferred between race distances, to another runner, or to a future race. If you need to request a refund, just log in to your registration profile and submit your request there. We put a lot into making this event happen out in the PA Endless Mountains, so please consider these details carefully before registering.
As a Trail Sisters Approved race, we will continue to offer a pregnancy & postpartum refund as we have in the past. Whether planned or unplanned, expected or unexpected, start or end of a pregnancy, healing and recovery time are required for a women’s overall health. Please contact us for a refund option if you’re past the full refund date.
When the event reaches it’s capacity, you’ll have the option to join the wait list. When a spot opens, Runsignup will automatically email an invitation to the next person in line, based on when they joined the list. If you receive an invite to join the event, you’ll have 48 hours to accept or decline it – after that, the offer expires and moves on to the next runner on the wait list.
relentless and brutally epic
Our Story
Iron Forged Runners is a grassroots organization based in Pennsylvania, committed to fostering a passion for trail running. Our mission is to inspire runners by offering races that challenge their limits, encouraging personal growth and resilience through demanding and rewarding events. Additionally, we aim to raise awareness of the beauty and accessibility of Pennsylvania’s State Parks and Forests, encouraging more people to explore and appreciate these outdoor treasures.
© 2026 Worlds End Ultramarathon. All rights reserved.