Worlds End Ultramarathon

Event overview

The Worlds End Ultramarathon takes place in Forksville, Pennsylvania, on May 30, 2026. The event offers two single-loop trail ultramarathon options:

• 63.8 miles (100k)
• 31.4 miles (50k)

Registration opens December 6, 2025 at 6:00 pm EST. Entry fees listed on the event page are $195 for the 100k and $105 for the 50k.

Course and race logistics

Both courses run on rugged, scenic single-track and double-track trails in Loyalsock State Forest and Worlds End State Park on the Loyalsock Trail in the Endless Mountains. The 100k is approximately 12,000 feet of elevation gain and the 50k about 5,800 feet. The routes include waterfalls, named overlooks and vistas, rock formations, narrow gorges, and pond scenery; some sections are remote and technical. The 100k has 13 aid stations, four crew-accessible aid stations, three pacer exchange locations, and a 19-hour cutoff. The 50k has six aid stations, no crew access, no pacers permitted, and a 12-hour cutoff. The 100k is part of the Pennsylvania Triple Crown of Mountain Running series. The event location is listed as 82 Cabin Bridge Rd, Forksville, PA 18616. Post-race food includes soups, chili, pulled pork, and vegetarian and vegan options. Visit the organization's website for the most recent information.