Rothrock by UTMB™

Rothrock by UTMB™ is the newest stop on the UTMB World Series and the second event on the Eastern side of the United States, joining Grindstone Running Festival by UTMB®. The inaugural edition will take place May 16–17, 2026 in Rothrock State Forest, just outside State College, Pennsylvania (Happy Valley).

The event features 50km and 25km distances that build on the legacy of the Rothrock Trail Challenge, established in 2009. That race became known for its rugged, community-driven atmosphere and its iconic tagline: “For those about to Rothrock, we salute you!” The 25km course continues along the classic Rothrock Trail Challenge route, while the new 50km course expands the adventure across even more of the forest’s wild terrain.

Working closely with the original race management team, UTMB World Series is committed to honoring Rothrock’s heritage while bringing a world-class trail running experience to the heart of Pennsylvania.

Who: UTMB

What: Trail Race

When: May 16-17, 2026

Where: Rothrock State Forest