DateExpected
Mid April 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Stade de Barcus, Barcus
Barcus, Pyrénées-Atlantiques
Countdown
April
A proper mountain half in the Pyrénées foothills: 1,400 m of climbing in 21 km means steep ground and plenty of walking, so pace it like a long day out.
Key facts
01Runners must be 18 or over on the day
02Rankings are split by sex
Create a free training plan for the Ahargo Lasterkaz 21 km
7-day free trial, no card required
The course
The route
Barcus
Distance21km
Total climb1,400m
StartElevation
0 kmDrag map to rotate19.6 km
Weather
Mid-April, Barcus
15°CTypical high
5°CTypical low
-3°CColdest in 20 years
45%Days with rain
Highs around 15°C and lows around 5°C, but it has dropped to -3°C. Rain on 45% 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
01DARMAILLACQ Agathe02:24:328.7 km/h
02LE CAM Aziliz02:26:208.6 km/h
03SERÇA Cécile02:27:518.5 km/h
52
Women finishers
3:10:29
Median time
6.6 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
OrganiserParents d’élèves de l’école de Barcus (CPE Ecole de Barcus)
Websiteahargo-trail.eus
Instagram@ahargolasterkaz
Training
Training for the Ahargo Lasterkaz 21 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 Ahargo Lasterkaz 21 km plan targets
Typical sessions
21 km with 1,400 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 Ahargo Lasterkaz 21 km plan.
7-day free trial, no card required.
Other races at Ahargo Lasterkaz
More events in April in France
Trail de l'Aber Wrac'hSat, 3 Apr 2027 · Le Folgoët→Trail des Collines NormandesSat, 3 Apr 2027 · Condé-en-Normandie→La Corima Drôme ProvençaleSun, 4 Apr 2027 · Montélimar→Le Grand Défi des VosgesSun, 4 Apr 2027 · Niederbronn-les-Bains→Les Délices de l'UrsuiaExpected Early April 2027 · Hasparren→Les Vosgirunners Trails NatureSun, 4 Apr 2027 · Départ au stade Paul Weber→
