Grindstone Running Festival by UTMB® 2026

Welcome to one of the most formidable trail festivals on the American East Coast, recently brought into the UTMB World Series fold 🪨.

The Grindstone Running Festival by UTMB® takes place every September in the Shenandoah Valley, in Virginia, in the heart of a national forest with the rather regal double name George Washington and Jefferson National Forest 🌲. It’s there, between the Blue Ridge Mountains and the Alleghanies, that four distances coexist in perfect harmony... Well, “harmony” might be pushing it when you’re talking about climbs like these 😅. There’s the 21 km and 500 mD+, the 50 km and 1,550 mD+, the 100 km and 3,350 mD+, and finally the 100M: 167.4 km and 6,400 mD+ 🏔️. The big boss of the East Coast! 💪

To give you an idea, it’s a bit like climbing Everest twice from base camp 🤯. Except in trail running, nobody resupplies you by helicopter ☕. The course starts from Camp Shenandoah ⛺️, a scout camp founded in 1950, and strings together legendary summits: Elliott Knob, Reddish Knob, Great North Mountain… All on an out-and-back route, which means that halfway through, when you’re exhausted, you still have just as far to go to get back 😳. What makes Grindstone absolutely legendary in the American ultrarunner community is its well-established reputation for being the toughest 100 miler east of the 100th meridian, an imaginary boundary that cuts the United States in two, somewhere in the Great Plains. East of that line, the landforms are older, rounder, but don’t be fooled: the Appalachians have shaped technical, winding, often wet trails, surrounded by dense vegetation that has a mind of its own 🤪. 100M runners have 38 hours to get it done; those who make it walk away with an engraved belt buckle, a sacred tradition of American ultra 🏅.

With its four distances, the Grindstone Running Festival embodies exactly what we love at Finishers: the idea that adventure isn’t reserved for people who have been running forever, and that every distance has its own nobility 🤴. You can start with the 21K and dream of the 100M a few years from now 📆. The key is to set foot on this trail, lift your eyes to the ridges of Virginia, and understand why thousands of runners cross the Atlantic every year to run here 🌍.

What’s fascinating about Grindstone is its recent transformation ☝️. Originally an underground race beloved by insiders, it joined the UTMB World Series ecosystem 🤩, giving it today the status of a double qualifier: for the UTMB finals on one side, and for the Western States Endurance Run on the other, the most legendary 100-mile race in the world, with its annual lottery where thousands of runners hope to land a bib 🎫. Finishing Grindstone therefore opens two doors to the holy grail of ultra 🚪. The extra magic is the timing 🍁. In September, the Shenandoah Valley enters the period when deciduous forests turn red, orange, and gold, turning every ridge into an impressionist painting 🖼️. 100M runners go through at least one sunrise and one sunset in this setting, which helps them remember, between two cramps, why they signed up for it 🌅.

Because that’s what trail is: you don’t need to be the fastest, you just need to be there, feet in Appalachian mud, watching the sun come up... And telling yourself you’ve earned it 😍.