Registration

REGISTRATION OVERVIEW

2025 Online Registration is Now Closed. You can register for any non sold-out distance at the Expo. You must register two hours before the 100M race start time. There will be no race day registrations on Saturday for the 100K. Please note if you are registering for the 100M at this time you must pay the $200 trail work buyout option on top of your registration fee to participate.

Race Date: September 19-21, 2025 | Event Location: Natural Chimneys Park, VA

Distances: 100M, 100K, 50K, 21K | Runner Check-In: September 18-20, 2025

2025 Registration Fees

Info	100M	100K	50K	21K
Date	Sept. 19	Sept. 20	Sept. 20	Sept. 20
Price	$399.08	$362.38
Proc. Fees	$35.92	$32.61
All-In price	$435	$394.99	SOLD OUT	SOLD OUT

*Limited spots available at this price. Prices may increase at anytime.

2025 UTMB Cares Bib Registration Fees

Info	100M	100K	50K	21K
Date	Sept. 19	Sept. 20	Sept. 20	Sept. 20
Price	$800.00	$700.00	$500.00
Proc. Fees	$72.00	$63.00	$45.00
All-In price	$872	$763	$545	SOLD OUT

*UTMB CARES entry includes a chartable giveback component as part of your registration to provide runners with the opportunity to Race For More.

Registration fee covers the race, services and finisher gifts at the Grindstone Running Festival by UTMB

Registration packet for all distances
Finisher medals for the 21K and 50K; Special finisher gift for the 100K; Belt Buckle for 100M
Race t-shirt
Unique awards in each distance will be given at the award ceremony
All the services provided on the course (food and drinks on the aid stations, timing services, medical service, transportation (when dropping from the race))
Delicious and well-deserved meal after the race to help you recover faster
Registration and local vendor services on site

Withdrawal Options: This registration is non-refundable and non-transferable. All deferral requests will be honored until Aug. 20, 2025, regardless of the reason for deferral. The deferral may only be used once. To submit a deferral request, please contact grindstone@service.byutmb.world.

Runners who register within 50 days prior to Race Day will not have race materials personalized (name on merchandise apparel and name on race bib).
Runners must be at least 18 years old to participate in the 100M, 100k and 50k, and 16 years old to participate in the 21k.
There is NO RACE DAY REGISTRATION.
Online Registration Closes: Sunday, September 14, 2025, at 11:59 pm PST or until the races are sold out.
We will take onsite registrations at the expo for any open distances.
Distance changes are subject to availability. Please reach out to the event inbox to inquire.
Distance change requests can be made via email up to 45 days prior to the event. After the 45-day deadline, all distance changes must be completed at the event expo when picking up your bib. There are no distance changes on race day.
Reference the REGISTRATION FEE section on this page for the withdrawal policy.
For questions, please reach out to grindstone@service.byutmb.world.

Grindstone Running Festival by UTMB is the start towards your quest to the UTMB World Series Finals in Chamonix, the mythic HOKA UTMB Mont Blanc, the holy grail of trail running in the heart of the Alps, set on the three key distances: OCC (50K), CCC® (100K) and UTMB® (100M), the pinnacle trail running event.

As a UTMB World Series Event, the Top 3 female and Top 3 male runners of the 100M distance, the 100K, and the 50K at Grindstone Running Festival gain automatic qualification to the UTMB, CCC, or OCC races, respectively.

All finishers of the Grindstone Running Festival by UTMB collect Running Stones that can be applied to the HOKA UTMB Mont-Blanc draw. To be eligible for the lottery, runners need to have a least one Running Stone and a valid UTMB Index.

Learn more