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description=Feed your sense of adventure and join us for the Grindstone Running Festival by UTMB. This one-of-a-kind event takes you through acres of national forest just west of the Shenandoah Valley on an iconic running adventure complete with stunning fall foliage, mountain views, and demanding terrain. With a 100M, 100K, 50K, and 21K, there s a new challenge for every runner. Join us for this feat to push your endurance, get gritty, earn your stones, and qualify for the iconic UTMB® World Series Finals.;
keywords=Ultra running, ultra marathon. UTMB, trail running;

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grindstone running festival by utmb skip to content utmb world utmb world series events select the event you re interested in register to discover the race europe 24 30 august 2026 10 13 september 2026 11 13 september 2026 18 20 september 2026 24 27 september 2026 23 25 october 2026 30 31 october 2026 30 october 01 november 2026 22 24 january 2027 18 21 march 2027 01 04 april 2027 08 10 april 2027 23 25 april 2027 30 april 02 may 2027 13 16 may 2027 5th june 2027 10 13 june 2027 17 19 june 2027 18 20 june 2027 23 27 june 2027 07 11 july 2027 08 10 july 2027 09 11 july 2027 14 18 july 2027 15 18 july 2027 23 25 july 2027 06 08 august 2026 01 02 august 2026 north america 10 12 september 2026 17 20 september 2026 01 03 october 2026 08 11 october 2026 13 15 november 2026 04 06 march 2027 08 11 april 2027 22 25 april 2027 14 16 may 2027 04 06 june 2027 21 23 august 2026 14 16 august 2026 23 25 july 2026 27 28 june 2026 asia 11 13 september 2026 11 13 september 2026 02 04 october 2026 16 18 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register homepage races menu register sign in your east coast trail running adventure register about the race feed your sense of adventure and join us for the grindstone running festival by utmb this one of a kind event takes you through acres of national forest just west of the shenandoah valley on an iconic running adventure complete with stunning fall foliage mountain views and demanding terrain with a 100m 100k 50k and 21k there s a new challenge for every runner join us for this feat to push your endurance get gritty earn your stones and qualify for the iconic utmb world series finals discover the races registrations open 18th september 2026 100m race category running stones 4 distance 167 4 km elevation gain 6400 m race details registrations open 19th september 2026 100k race category running stones 3 distance 100 km elevation gain 3350 m race details registrations open 19th september 2026 50k race category running stones 2 distance 50 km elevation gain 1550 m race details registrations open 19th september 2026 21k race category running stones 1 distance 21 km elevation gain 500 m race details step up to the challenge 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 most scenic and unique courses on the east coast 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 destination shenandoah 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 dual qualifier the grindstone trail running festival by utmb is a dual qualifier for the iconic utmb world series finals and the western states endurance run join the fun on the east coast and run to qualify for the opportunity to compete in some of the most iconic races in the trail running space utmb community bibs 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 sign up for grindstone by utmb announcements fill out the form below to get notifications for this race and other related events and be up to speed on opening dates event announcements future race dates and should additional race entries become available in the case of a sellout discover your statistics and follow your quest create a my utmb account to access detailed statistics about your past races consult your utmb index compare your performance against fellow trail runners check your amount of running stones view your upcoming utmb world series events and much more create your account join us list of races sponsorship press become a volunteer stay in touch contact us newsletter sign up follow us terms conditions privacy policy cookies preferences 2024 copyright grindstone trail running festival by utmb please note ultra trail and utmb are registered trademarks