DateExpected
Late March 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Château de Chastellux, Chastellux-sur-Cure, France
Chastellux-sur-Cure, Yonne
Countdown
March
A 12 km trail loop with some rolling climbing (300 m). A good step up from the short run without being daunting.
Key facts
01Open to all ages
Create a free training plan for the Défi de Chastellux 12 km
7-day free trial, no card required
The course
The route
Chastellux-sur-Cure
Distance12km
Total climb308m
StartElevation
0 kmDrag map to rotate12.4 km
Weather
Late-March, Chastellux-sur-Cure
13°CTypical high
3°CTypical low
-5°CColdest in 20 years
41%Days with rain
Highs around 13°C and lows around 3°C, but it has dropped to -5°C. Rain on 41% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
OrganiserEntente Cyclo Sportive Avallonnaise (ECSA / ECS Avallon)
Websiteecsavallon.fr
Running since2018
Training
Training for the Défi de Chastellux 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 Défi de Chastellux 12 km plan targets
Typical sessions
12 km with 308 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 Défi de Chastellux 12 km plan.
7-day free trial, no card required.
Other races at Défi de Chastellux
More events in March in France
Black Mountain TrailExpected Early March 2027 · Saint-Amans-Soult→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→
