Date
Sun, 21 Mar 2027
Start
10:00
Venue
Rue Joseph Allanic / Complexe Joseph Lebret, Mesnil-Roc'h, France
Mesnil-Roc'h, Ille-et-Vilaine
Countdown
March
The short one: 12 km on a Sunday morning with hardly any climbing. Easy to enter, and open to younger runners too.
Key facts
01Solo entry only
02Born in 2011 or earlier
Create a free training plan for the Trail des Vallées 12 km
7-day free trial, no card required
The course
The route
Mesnil-Roc'h
Distance12km
Total climb170m
StartElevation
0 kmDrag map to rotate11.2 km
Weather
Late-March, Mesnil-Roc'h
13°CTypical high
5°CTypical low
-2°CColdest in 20 years
33%Days with rain
Highs around 13°C and lows around 5°C, but it has dropped to -2°C. Rain on 33% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Chloe BEAUDOT01:00:2911.9 km/h
02Adele Stum01:00:4511.9 km/h
03Julie BESNARD01:02:5611.4 km/h
154
Women finishers
1:29:57
Median time
8.0 km/h
Median speed
Women · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
OrganiserAssociation Saint Pierre Nature
Websitetraildesvallees.com
Instagram@trail.des.vallees
Running since2017
Training
Training for the Trail des Vallées 12 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Trail des Vallées 12 km plan targets
Typical sessions
12 km with 170 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Trail des Vallées 12 km plan.
7-day free trial, no card required.
Other races at Trail des Vallées
More events in March in France
Black Mountain TrailExpected Early March 2027 · Saint-Amans-Soult→Ceven'TrailSat, 6 Mar 2027 · Le Vigan→L'Ultra BaumeExpected Early March 2027 · Cuges-les-Pins→La MassingienneSat, 6 Mar 2027 · Massingy→Marathon de la ToureilleSat, 6 Mar 2027 · Le Vigan→Winter Trail RéallonExpected Early March 2027 · Réallon→
