Flysch Trail Zumaia 2027

The numbers for this race look contradictory: +1,007 m of climbing, but the highest point is only 230 m above sea level. That’s the whole character of the Flysch Trail. There’s no single mountain. Instead you get one short, steep climb after another, from coves and stream valleys up to the clifftop meadows above the Bay of Biscay. The rock layers you see along the way are the flysch, tilted strata of the Basque Coast UNESCO Global Geopark, most famously below the San Telmo hermitage at Itzurun beach.

Two distances

	24 km	14 km
Climb	+1,007 m	+487 m
Start	9:30	10:00
Places	400	250
Price	€30	€20
Minimum age	18	14 (with parental consent)

Both races finish by 13:45, which gives 24 km runners 4 h 15 min. That sounds generous for 24 km, but the constant climbing adds up. Walk the steep ramps early and save your legs for the descents.

Aid stations and what to carry

On the 2025 course, aid stations for the long race were at Elorriaga (twice), Mendata and Errotaberri with food and drink, and at the San Telmo hermitage with drinks only. There’s no mandatory kit list, but the organisers recommend a bottle for the longer stretches. One unusual rule: every gel or bar you carry must be marked with your bib number. The race runs through a protected geopark, and dropping litter outside the bins at aid stations means disqualification.

Entry

The Flysch Trail runs a gender-balanced entry. Registration opened on separate days for women and non-binary runners, for juniors, and for men, with the same number of places held for women and for men on each distance. Non-binary runners get their own ranking if at least three enter. Local runners also have their own categories. The regulations give 18 September as the closing date, but the Kronoak entry page lists 26 September, so check there whether places are still available. Withdrawals cost €6 and must be requested by the same date.

Race weekend

• Bib pickup: Alondegia cultural centre (Oxford room), Friday 2 October 17:00–20:00 or race morning 7:00–9:00. In person only, nobody can collect for you.
• Showers: Lubaki sports centre.
• 2025 was the 16th edition. The race is organised by Zumaia town council.