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100 kmTrail🇺🇸 Swoope, United States

Grindstone 100K

Saturday, 25 September 2027In 11 months · Start 06:00

Official site

Singletrack, forest roads and steep climbs in the Shenandoah Valley's George Washington National Forest, starting and finishing at the Natural Chimneys rock towers.

Something out of date? Suggest a correction · Organizer of this race?

Facts checked 10 Oct 2026 against grindstone.utmb.world, grindstone.utmb.world.

Elevation gain
3,350 m
Mountain · ↓ 3,350 m
Start altitude
436 m
above sea level, from terrain data
Temp at start
15°C
Peaks around 21°C
Entry fee
≈ $300
Open entry
Finishers
—
typical year
Course
Loop
18h cut-off
Getting thereFly into IAD (Dulles), about 155 km from the start

Course map

A detailed route is not available for this race yet. The marker shows the race location.

Elevation profile

Mountain: about 3,350 m of climbing and 3,350 m of descent. A detailed profile isn’t available for this race yet.

Race-day weather

At start
15°C
Peak during race
21°C
Humidity
82%
Chance of rain
21%
Wind
6 km/h

Race day in past years

Historical averages for 25 September ±3 days, 2016–2025, from 06:00 for 5 hours (70 days sampled). Source: Open-Meteo / ERA5.

What time could you run here?Adjust your goal time for this course’s hills and typical race-day weather.Race time calculator →

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Show your runners the course facts and race-day weather. Paste this code into your site; it displays the badge below and links to this page. It updates automatically when the race details change.

Plan your trip

Searches are set for Swoope and the race weekend.

Hotels near the start lineClosest first · 2027-09-24 → 2027-09-26Booking.com Flights to SwoopeArrive 2027-09-23, fly home 2027-09-27Google Flights Things to do in SwoopeTours and attractions in United States for the days around the raceGetYourGuide

Gear for this race

Trail running shoesGrip for the unpaved sectionsHydration vestCarry water and food between aid stationsElectrolyte tabletsIt often reaches 21°C during the raceRunning headlampFor early starts and running into the night

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