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Race data compiled from public sources; dates change — always confirm with the race organizer. Terrain: Mapzen/AWS Open Data, USGS 3DEP.

VA
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Virginia · Swoope

Grindstone

Sep 18, 2026WS

Qualifier status per the 2026 lists

Clark Zealand's 100-miler has started at 6 p.m. Friday since 2008, meaning every runner climbs Elliott's Knob — the highest point on the out-and-back course — in darkness on both legs. Set in Virginia's Allegheny Mountains with 21,000-plus feet of gain across roughly ten major ascents, including a 2,000-foot plunge down Cold Springs Trail in two miles, 84% of the route is natural single-track. In 2023 it joined the UTMB World Series, adding qualification stakes to an already demanding 36-hour clock.

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The numbers

Race statistics

Distance
100 mi
Vertical gain
20,000 ft

200 ft / mi

Course
Out & back
Unique miles
80 mi
Entry fee
$421
Lottery
No
Sub-24 hr
3%

of finishers

Avg finishers
109

per year

The course

Course map

Course line from published GPX · source · approximate — always follow official markings

◈ From the runners

Ratings & trip reports

◈ Field notes from elsewhere

What runners wrote & filmed

What other finishers have written and filmed. Off-site, unaffiliated.

Reports & guides

  • Grindstone 100 Race Report (2025, Lukas Burrer)↗Team RunRun · 2025
  • 2022 Grindstone 100 Race Report (Philip K. Perkins)↗Chasing 10K · 2022
  • 2023 Grindstone by UTMB Results Coverage (This Week in Running)↗iRunFar · 2023
  • Grindstone 100k 2024: A Reflection (Will Eckman)↗Medium · 2025

Films

  • RUNNING THE 2023 GRINDSTONE 100M↗YouTube · 2023
  • Grindstone 100 Ultramarathon by UTMB — The Year My Feet Fell Off↗YouTube · 2024
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