Worlds End Ultramarathon

Event overview

The Worlds End Ultramarathon is a single-day trail ultramarathon held May 30, 2026 in Forksville, Pennsylvania (82 Cabin Bridge Rd, Forksville, PA 18616). The event offers two single-loop trail races that use the Loyalsock Trail, Loyalsock State Forest and Worlds End State Park. The terrain is primarily rugged single-track with technical, rock-strewn sections, multiple short climbs and several longer sustained climbs. The 100k is part of the Pennsylvania Triple Crown of Mountain Running.

Distances

• 63.8 miles (100k), single loop
• 31.4 miles (50k), single loop

Course details and support

The 100k route includes waterfalls, vistas and named features such as High Rock Vista, Canyon Vista, Upper and Lower Alpine View, Kettle Creek Vista, High Knob Overlook, Double Run, Dry Run, Rode Falls, Lee's Falls, Split Rock and Sones Pond. The course description notes a wooden ladder beside Rode Falls and remote sections along rocky ledges. The 100k has about 13 aid stations, four crew-accessible aid stations and three pacer exchange locations. The 50k follows much of the same route but finishes earlier; it has about 6 aid stations, no crew-accessible aid and no pacers permitted.

Entry and qualification

Registration uses RunSignUp and opens December 6, 2025 at 6:00 PM. Entry fees are listed as $195 for the 100k and $105 for the 50k, plus registration fees. The event has a 200-person capacity and is first come, first served. The 100k requires a qualifying performance, typically completion of a 50k trail race within the advertised cut-off time within three years, with verifiable published results. A wait list opens after the race fills. Visit the organization's website for the most recent information.