Ut4M — Ultra Tour des 4 Massifs
ABOUT
About Ut4M — Ultra Tour des 4 Massifs
The Ut4M links four mountain ranges around Grenoble — Vercors, Taillefer, Belledonne and Chartreuse — over 177 km and 11,700 m of climbing. Thirteen formats in solo, relay or stage-race mode make it one of the most versatile trail playgrounds in the Alps.
PICK YOUR RACE
The course, estimator and times below adapt to your pick
Current pick: Ut4M — Ultra Tour des 4 Massifs — Ut4M 20 Chartreuse · 20 km · 11,700 m D+
The presentation above is shared across Ut4M — Ultra Tour des 4 Massifs · the blocks below (course, estimator, results, logistics, weather…) reflect your pick.
BLOCK 2 · COURSE
20 km, 11,700 m climb
Course map, elevation profile, notable segments, aid stations and cutoffs.
BLOCK 3 · ESTIMATOR
Your real finish time
Link your data or your ITRA, we calibrate against the historical peloton.
What's your real finish time?
Link Strava, Coros, Garmin or Suunto — or use your ITRA. We compare your profile to thousands of finishers and compute your time with confidence interval.
Ballpark by profile. Compute yours in 2 min.
- ~12h34
Trained runner
Top 10 % of finishers
- ~15h59
Regular runner
Around the median
- ~20h33
Conservative pace
Comfortable margin
BLOCK 4 · DATA & RESULTS
2026 edition — times and roll of honour
Winners, median time, finish rate, distribution. Claim your finish to reveal your full name.
Find your finish time
Search across all historical finishers.
No results yet for Ut4M 20 Chartreuse 2026.
Results are added shortly after each edition.
BLOCK 5 · LOGISTICS
Pre-race essentials
How to get there (train, carpool), bib pickup, mandatory gear, and everything you need to know on-site.
How to get there
Pick your way in
Come by train
Get to the race by train
Nearest station: Grenoble — 1 km from the start. Eco-friendly, no parking hassle.
Dates on SNCF Connect must be re-selected on the next page (their URL doesn't yet carry them).
Carpool
Share the ride with other runners
Soon: a per-race carpool thread with direct runner-to-runner listings. In the meantime, check BlaBlaCar or local Facebook groups.
On site
Shuttles, bibs, parking, lodging
LOGISTICS
Logistics and access
- Bib pickup
- Halle Clemenceau, Grenoble
Weather & conditions
Plan for conditions up to 2,645 m altitude.
Live forecast
Available starting J-14 — 21 days to go.
BLOCK 8 · COMMUNITY
From finishers, for finishers
Ratings, race reports, photos, Q&A. What you won't read on the official site.
Do you organize this race?