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UltraUnited StatesVirginia

Grindstone 100 Mile 2026

18.09 – 20.09.2026Natural Chimneys Park (United States)
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6’40020’997 m D+ ft D+

167.4 km104 mi100mi

At a glance

Grindstone 100 Mile 2026 took place from Friday 18 to Sunday 20 September 2026 in Natural Chimneys Park (Virginia, United States). One distance: 167.4 km.

The course is 167.4 km with 6’400 m D+ (38 m per km: mountain terrain). Terrain: 66% trail, 20% forest track and 14% road. Terrain data: © OpenStreetMap contributors.

The 2027 edition takes place on Friday 24 September 2027. On Kliva, plan your pacing and nutrition for free, then send the plan to your watch.

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…
From the organiser

1 course

  1. 167.4km104mi

    6’400 m D+20’997 ft D+

    5’971 m D-19’590 ft D-

    avg 4%

    100mi
    No index
    GPX

Course analysis

100mi167.4 km104 mi6’400 m D+20’997 ft D+

231effort kmⓘ167.4 km on the map · feels like 231 km104 mi on the map · feels like 231 km
D+
6’400 m20’997 ft
D−
5’971 m19’590 ft
Max alt.
1’323 m4’341 ft
Steepest
24%

Segments

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Elevation profile: 100mi

405 m – 1’323 m1’329 ft – 4’341 ft

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