22nd September 2023
With approximately 21,000’ of vertical gain that includes monster climbs and the solitude of single-track ridge running, the Grindstone 100-mile race is considered by many to be the most incredible ‘hundo’ east of the 100th meridian.
Natural Chimneys Park
Max Allowed Race Time
From the beautiful start/finish location at the historic Natural Chimneys, the course eases you in before reaching the top of Narrow Back Mtn along the scenic ridge and down buttery single-track to connect to the Wolf Ridge aid station. From there you begin your first monster climb up Wolf Ridge to Reddish Knob, over to Little Bald Knob before jumping on the iconic Wild Oak National Recreation Trail and following it over Grindstone Mtn, Lookout Mtn, Hankey Mtn and down some of the sweetest single-track to Dowells Draft. From there, the course travels south over Crawford Knob before climbing the brutal Elliott’s Knob to the course’s highest elevation, only to drop 2000’ in 2 miles down Cold Springs Trail. Take the Cold Springs forest access, returning up and over Crawford Knob, through Dowells Draft to Hankey Mtn and descend the old-school flow of Magic Moss. Continuing on the short gravel section is a welcome reprieve before the steep Horse Trough climb takes you up and over, rejoining the Wild Oak Trail and back to North River Gap. Meander your way up and over Narrow Back Mtn again via the Tillman Trail and cruise back down Lick Run to finish right in front of the towering limestone chimneys.
- Minimum water supply: 1 liter of hydration capacity
- Reusable cup/flask/bottle
- One (1) working headlamp with spare cells/batteries.
- Recommendation of 200 lumens or more for night running.
- Jacket with hood for bad weather in the mountains/course terrain
- Running pack to carry recommended gear throughout the race.
- Mobile/Cell phone with international roaming that works in the United States of America.
- Additional working headlamp
We ask that all 100M runners complete 8 hours of trail work prior to race weekend. When you check in for the race during expo we’ll ask for your Trail Work Form, documenting your trail work experience, so please plan to bring the form with you. Learn more in the Rules and Regulations Guide.
Cut Off Time
9/24/2023 6:00 AM - 36 Hours