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Worlds End Ultramarathon

June 5, 2027
Forksville, PA 18616 US

Registration Opens

Run like there's no tomorrow

100k

Price: $210
Time: 5:00AM EDT 11:59PM EDT

200 spots left.

The difficulty of the terrain means this is not an entry-level race. At a minimum, all participants must have completed at least one 50k or longer trail race within the advertised cut-off time before signing up. This must be within 3 years of the registration date.
Relentless and brutally epic

50k

Price: $120
Time: 7:00AM EDT 7:00PM EDT

250 spots left.

You DO NOT need any qualifying races to participate in the 50k. Even so, be aware that this race is not a beginners-level event. You will need to negotiate rock fields, narrow and uneven terrain, steep climbs and precipitous descents.
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One of the toughest and most beautiful courses you’ll find anywhere! The Worlds End Ultramarathon is a challenging foot race that explores the Loyalsock Trail, Loyalsock State Forest and Worlds End State Park in the Endless Mountains of Pennsylvania. The routes are largely rugged, scenic-dense single-track trails with some fairly remote sections, several waterfalls and multiple vistas of the beautiful Endless Mountains. The PA Department of Conservation and Natural Resources describes Worlds End State Park as "virtually in a class by itself, this wild, rugged and rustic area seems almost untamed." This is NOT a beginner-level ultra and participation in the race should not be taken lightly.


100k Course Description
The course is predominantly rugged single-track that winds it's way through the the Endless Mountains in the Loyalsock State Forest and Worlds End State Park. Your effort will reward you with beautiful overlooks such as High Rock Vista, Canyon Vista, Upper and Lower Alpine View, Kettle Creek Vista, and High Knob Overlook along with spectacular cascades and falls like Double Run, Dry Run, Rode Falls and Lee's Falls in the Ketchum Run Gorge, just to name a few. You'll pass many interesting rock formations like Split Rock, take in the tranquility of Sones Pond and climb a wooden ladder along side Rode Falls. 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 12,000 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 19 hours to complete this race.

Make no mistake, this race is intended to grind you down over the long haul. Luckily, we'll take care of you with 13 aid stations along the way. Not only will you see the usual ultra spread, expect to see delicious fresh fruit, bacon, and a plethora of other delicious treats to keep you moving to the finish line. You'll also have 4 aid stations that will be crew accessible and 3 locations to pick up and swap pacers from.

**The Worlds End 100k is also part of the Pennsylvania Triple Crown of Mountain Running series. These races showcase the best of Pennsylvania’s ultra mountain-running scene and celebrates the wild beauty of these rugged old mountains, and the vibrant trail-running culture that thrives in them. Do you have what it takes to tame the wilderness races of PA?**


50k Course Description
If you are not ready to tackle the full 100k but still want to take in the beauty of Worlds End, you can still challenge yourself with the 50k course. The race follows the same route as the 100k but veers off to bring you home before the start of the lower loop. While only half the distance and half the elevation (5,800 feet), it's still chock full of fabulous scenery and awesome trails. We also give you a more generous time limit of 12 hours to complete the course.

Now don't let the distance fool you, the 50k will grind you down over the long haul too. Luckily, we'll take care of you with 6 aid stations along the way. You will you see the usual ultra spread, but also delicious fresh fruit, bacon, and a plethora of other delicious treats to keep you moving to the finish line. Only one aid station is crew accessible and no pacers are permitted in the 50k race.

Event Pricing:
Due to immediate sell out of the event, we have one fixed price for each distance. We have a 200 participant cap for the 100k and a 250 participant cap for the 50k. Once filled we will open a waiting list.

  • 50k Price - $120 + registration fee
  • 100k Price - $210 + registration fee

100k Quailfication:
The difficulty of the terrain means this is NOT an entry-level race. Each potential 100k participant will be reviewed by the race directors after we receive the completed registration. At a minimum, all participants must have completed at least one 50k or longer trail race within the advertised cut-off time before signing up. This must be within 3 years of the registration date. If you have a race that is not at least a 50k but has a high degree of difficulty, it may be an exception to the above standard – just email us to find out if the race may qualify you. Be sure that your race is an official race with results published on a publicly available website. Timed races can not be used as a qualifying race. You must have completed a qualifying race before registering.

Note: Qualifying criteria are in place for event safety, manageability, and so that all participants are set up to have a positive race experience. Those not meeting the requirements will not be allowed entry to the race.


Refund Policy:
We understand sometimes life takes priority over running and plans change! Here's how our refund policy works:

  • 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 deferrals are not an option, nor can registrations be transferred to another runner or to a different 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 Wilds, 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 and you don't want a deferral.

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Volunteering Opportunities

If I were to ask you about your trail running resume, how would you answer? Would it include your fastest finishing time? Would it be the longest race you’ve completed? Maybe your thoughts would go to your toughest finish or the event that gave you the most personal growth. Perhaps you have so many races that you’d have a hard time figuring out which ones should even be on that list.

I wonder if anyone would ever think of including being an aid station captain at Eastern States, a sweeper at Black Forest, or an aid station crew member at Ironstone as part of that resume? Would helping organize the local 5k make the cut? How about assisting the logistic teams who make the back end machine run on race day?

I hope this thought exercise resonates with you and helps you recognize how this community relies on the support and commitment from everyone who participates. Those fastest finishing times and personal growth moments happened because of the selfless service from individuals like you who stepped up to volunteer. If you haven’t yet padded your resume with a solid list of volunteering, volunteering is half the fun the amazing trail community has to offer.

If you're looking for that opportunity, come join us at the Worlds End Ultra. We've made it easy to sign up, and our new Volunteer Portal has you covered with finding your role details, shift info, and everything you need to feel prepared and confident on race day. It’s never been easier to sign up, have fun, and build your trail running resume.

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