Twenty years of early morning starts. Twenty years of trail work. Twenty years of mountain miles. Twenty years of unforgettable finishes.

For 20 years, runners have tested themselves against the rugged trails, relentless climbs, and unforgettable beauty of Virginia.

In 2027, we're celebrating this milestone anniversary and inviting you to be part of the next chapter.

From the iconic 100M to the unforgettable mountain experience that defines every distance, Grindstone Trail Running Festival by UTMB delivers a race weekend that challenges, inspires, and rewards every runner who takes on the journey.

One of the hardest courses on the East Coast, Grindstone challenges and pushes runners to test their limits. With a highly technical course, runners will overcome high elevation, ridges, peaks, valleys, and all the grit the Shenandoah Valley has to offer. Think you have what it takes to take on this terrain? Push yourself and take in all the breathtaking experiences this running festival provides.

Set during peak fall foliage, the Shenandoah Valley captures all the beauty the East Coast has to offer. With miles through the George Washington and Jefferson National Forest, runners will take in peaks, valleys, sunrises, and sunsets. Runners will take the trail through the diverse wildlife as they climb the Appalachian Mountains and trek along the ridge to stunning views. With 4 unique courses including the 100M, 100K, 21K, and the all-new 50K distance, there is an adventure for every runner, introducing new runners to the trail community.

Let the Shenandoah Valley be your next run-cation. Between the Blue Ridge Mountains and the Alleghanies, the Shenandoah Valley is full of fresh-air adventure around every turn. Run through ridges, peaks, valleys, and take in the stunning views while surrounded by fall foliage. The winding trails will give you the top views for sunrises and sunsets. But it doesn't stop there. Once you're done your race, you can take in the surrounding towns and all of the unique experiences they have to offer.

Through UTMB Community Bibs, we have set out to achieve something extraordinary by caring for the amazing environments that host our trail events. The UTMB Community Bibs are a part of The IRONMAN Foundation, which creates positive change in By UTMB®, IRONMAN®, and Rock 'n' Roll Running Series® event communities through grant funding and volunteerism. Your donations support local community organizations and trail stewardship programs. Together, we make a positive impact on the local communities that host our events and local trails that we enjoy running on. Since 2003, over $60 million has been provided through IRONMAN and IRONMAN Foundation charitable giveback programs to more than 10,000 local, regional, national, and global nonprofit initiatives. UTMB Community Bibs can be purchased through the Registration page, and half of the registration costs go towards a local charity, chosen by the race team.