UTMB World Series EventChecked 2026-08-17
Official UTMB World Series Event; eligible finishers can earn Running Stones and record a UTMB Index result.
Official classification source ↗EventsFind this location on a map
USARunningTrail100K · 100 km / 62.1 mi100M20K · 20 km / 12.4 mi50K · 50 km / 31.1 miUltra · 50 km+ / 31+ miUTMB World Series Event
Grindstone Trail Running Festival
Natural Chimneys Park, VA · USA
Next race day
Fri, 24 Sept 2027
Time TBC · EDT
About Grindstone Trail Running Festival
Grindstone Trail Running Festival is a running event in Natural Chimneys Park, VA, United States. Recorded disciplines include 100K, 100M, 20K, 50K, Ultra. The listed surface is trail. The listed organiser is UTMB World Series / local organiser. The next listed date is 24 September 2027. Check the organiser's information for entry and race-day arrangements. The ATHRECS archive includes editions from 2026. This describes the editions recorded here, not the event's founding date or complete history.
Dates, starts & entry
Times are local to the race. Select the entry route for your distance.
- Entry details
167.4K · 167.4 km / 104.0 mi
Fri, 24 Sept 2027
Start time not yet confirmed
Date TBC
100M: 167.4 km, starting at Natural Chimneys Park.
Edition source - Entry details
21K · 21 km / 13.0 mi
Sat, 25 Sept 2027
Start time not yet confirmed
Date TBC
21K: 21 km, starting at Natural Chimneys Park.
Edition source - Entry details
50K · 50 km / 31.1 mi
Sat, 25 Sept 2027
Start time not yet confirmed
Date TBC
50K: 50 km, starting at Natural Chimneys Park.
Edition source - Entry details
100K · 100 km / 62.1 mi
Sat, 25 Sept 2027
Start time not yet confirmed
Date TBC
100K: 100 km, starting at Natural Chimneys Park, VA.
Edition source
Location & race day
Listed venue / area
Natural Chimneys Park, VAUSA
Confirm the exact start line, parking and arrival instructions with the organiser. A listed town or postcode may cover a wider area.
About the race
Official UTMB World Series event in Natural Chimneys Park, VA, United States. Check the organiser page for the individual races, mandatory kit, entry requirements and current Running Stones information.
- Surface:
- Trail
- Organiser:
- UTMB World Series / local organiser
Series & qualification
Classification is checked against the official series source and recorded by edition where qualification status can change.
Ways to enter
Compare the listed booking routes. Verified links show when they were checked.
Fri, 24 Sept 2027
Official race entry
Official entry
Check availability
Recorded Wed, 14 Oct 2026
View Official race entryThird-party prices, booking fees, allocations and refund terms can differ. Confirm the final details with the provider before paying.
Results
Public-figure or athlete-approved ATHRECS results, plus verified organiser links.
No verified results links have been added yet.
Past races
Ultra · 50 km+ / 31+ miFinished
Thu, 17 Sept 2026
Event weekend 2026-09-17 to 2026-09-20. See the official event for individual race dates.
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