DateExpected
Late October 2026
Based on past editions. We'll confirm when the organiser announces.
Venue
Herriko plaza, Arrankudiaga-Zollo, Bizkaia
Arrankudiaga, Euskadi
Countdown
October
A half marathon distance on the trails with a serious 970 m of climbing, started in the afternoon. Runners get three checkpoints to beat, so pace matters.
Key facts
01Three cut-offs: km 5.1 in 1:00, km 11.3 in 1:40, km 17 in 2:30
02No licence needed; 18+, or 16-17 with guardian consent
03Under-16s only at the organiser's discretion
Create a free training plan for the Arrankudiaga-Zolloko Trail Lasterketa 21 km
7-day free trial, no card required
The course
The route
Arrankudiaga
Distance21km
Total climb970m
StartElevation
0 kmDrag map to rotate20.8 km
Weather
Late-October, Arrankudiaga
18°CTypical high
9°CTypical low
0°CColdest in 20 years
37%Days with rain
Highs around 18°C and lows around 9°C, but it has dropped to 0°C. Rain on 37% 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
OrganiserArrankudiaga-Zollo Town Hall (Arrankudiaga-Zolloko Udala)
Websitesites.google.com
Instagram@arrankuzollo.trail
Running since2012
Training
Training for the Arrankudiaga-Zolloko Trail Lasterketa 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 Arrankudiaga-Zolloko Trail Lasterketa 21 km plan targets
Typical sessions
21 km with 970 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 Arrankudiaga-Zolloko Trail Lasterketa 21 km plan.
7-day free trial, no card required.
Other races at Arrankudiaga-Zolloko Trail Lasterketa
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