Grindstone 100M

Results: 2026

Jordan Buck won in 20:58:15 and Katti Jackson won the women's race in 21:46:37, fourth overall.

UTMB's result list includes entries without a finish time, so no finisher count is recorded here. iRunFar's weekly roundup reports the same winners.

Source: UTMB World — Grindstone by UTMB 2026, 100M results. Checked September 24, 2026.

Next edition: September 24, 2027. The 2027 festival runs September 23–26; registration had not opened when this was checked.

Event Overview

Course & Terrain

Mountain loop from Natural Chimneys Park using forest roads, ridgelines, and technical singletrack.

Why This Race Matters

Grindstone 100M is a useful reference point for runners comparing long fixed-distance ultras that still unfold over multiple days. Its format, terrain, and support model shape the kind of preparation required: not just fitness, but pacing discipline, nutrition planning, foot care, and the ability to make good decisions under fatigue.

Preparing for a Race Like Grindstone 100M

The 100-mile race guide covers the format as a whole. These guides go deeper:

• Walking strategy for ultramarathons: When and how to walk by terrain, effort and cutoffs.
• Crew and aid-station strategy: Crew tables, aid stops, drop bags and runner preferences.
• Gut training for ultrarunners: A six-week practice sequence for race-day fueling.
• Tapering for ultramarathons: Plan the taper and race week around your own recovery.

Planning Notes

• Prepare for sleep decisions, weather swings, and aid-station discipline. The distance is only one part of a multi-day fixed-distance race.
• Treat intermediate cutoff gates as part of the course. Build enough margin for aid stops and late-race slowdown, and verify every current gate in the official rules.
• Train for terrain-specific fatigue. Technical trails and mountain courses demand downhill durability, hiking efficiency, and reliable night lighting.
• The directory does not mark this as having simpler logistics. Confirm qualification, terrain, support, registration, medical, and withdrawal requirements before planning around it.

Related Preparation

• Compare verified US 100-mile races
• Compare this race in the full 2026 calendar
• Open the 100-Mile format guide
• Open the Fixed-Distance format guide
• Compare all race formats
• Use the timed-race pace calculator
• Plan checkpoint arrivals and cutoff buffers
• Build a crew and drop-bag plan
• Build a race-specific gear checklist