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Grindstone 100K by UTMB 2027 race guide

Mount Solon, United States25 September 2027

Start trainingOfficial entry & details

Mount Solon race on 2027-09-25: official date, course context, training start dates and edition-specific planning checks.

Updated and verified Oct 18, 2026

The race at a glance

Elevation gain
3350 m

Route and elevation

Published figures (2026 reference route; 2027 route subject to change): 100 km and approximately 3,350 m of climbing, with an overall time limit of 18 hours. The organizer confirms the 25 September 2027 race date but labels the currently linked GPX as the 2026 route, subject to change for 2027.

  • Published distance: 100 km (2026 reference route; 2027 route subject to change).
  • Approximate ascent: 3,350 m (2026 reference route; 2027 route subject to change).
  • Course and cutoff figures apply to the 2026 reference route; 2027 route subject to change; verify final maps and checkpoint rules.

Race guide

Race overview

Grindstone 100K by UTMB is listed for Mount Solon, United States. The organizer lists 2027-09-25. Confirm your own distance or division schedule before booking travel.

Official event information was checked on 2026-10-18. Entry status at this check: Get notified. Availability may change.

Final official-source checklist

Within race week, reopen the official event page and confirm date, venue, start procedure, entry status, course, rules, equipment, cutoffs and emergency guidance. Keep the current athlete guide available offline if the organiser provides one.

Further reading

Training plan and timing

Compare the start dates below, then choose a plan that fits your current training and available time.

46 weeks and 4 days remain until the listed 25 September 2027 race day.

  1. Start27 March 2027
  2. Build26 weeks
  3. Taper3 weeks
  4. Race day25 September 2027

26-week plan option

Explore training plans

Need a printable plan? Download the 100K training plan PDF.

Race-day strategy

  • Pace climbs by effort instead of chasing an even split.
  • Practise controlled climbing and descending before race week.
Open race calculators and tools
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Race-week logistics

Use the current organiser guide for schedules, transport, cutoffs, equipment, and other time-sensitive instructions.

Current details to confirm: start schedule, expo, bib pickup, transport, cutoffs, equipment rules, entry price.

Registration

Check official registration

Start logistics

06:00 local time at Natural Chimneys Park, VA (2027-09-25 edition). Recheck the final schedule.

Cutoffs

18 hours — 2026 reference route; 2027 route subject to change.

Checkpoint cutoffs are separate; use the organizer’s current table for your edition.

Adaptive AI coach for iPhone

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FAQs

When is this race?

The organizer lists 2027-09-25. Confirm your own distance or division schedule before booking travel. Source checked 2026-10-18.

Where is this race?

The official event page lists Grindstone 100K by UTMB in Mount Solon, Virginia, United States. Confirm the venue address and access instructions on the current event page.

How long should I train for this race?

Compare the 26 week plans with your current consistency, event-specific demands, recovery and available runway. Do not compress missed weeks if a standard start date has passed.

What should I verify before entering this race?

Check the current date, entry status, eligibility, course or venue layout, equipment, cutoffs, cancellation terms and travel demands on the official organiser page.

Is the course information for this race final?

No. The distance and current high-level course signals come from official organizer material. Use the latest map or GPX, athlete guide, elevation profile, aid plan and cutoff table for final decisions.

Can a calculator predict my race result?

No. Calculators organize assumptions. Weather, terrain, venue flow, transitions, nutrition, health, crowding and late-race fatigue can change the result.

How many weeks until this race 2026?

The listed event starts 2027-09-25. Use the training start-date calculator for the current runway. If racing is already underway, follow your individual start schedule rather than starting a new build.

What are the race 2026 route, elevation and cutoff time?

Published figures (2026 reference route; 2027 route subject to change): 100 km and approximately 3,350 m of climbing, with an overall time limit of 18 hours. The organizer confirms the 25 September 2027 race date but labels the currently linked GPX as the 2026 route, subject to change for 2027.

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Sources