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European ultra season isn’t one season — it moves geographically as the year goes on. Understanding that shift makes it much easier to use the month filter on our calendar to plan a multi-race year.
Late winter – spring: the islands open the season
The Canary Islands (Transgrancanaria, Transvulcania, Tenerife Bluetrail) and southern Iberia race from February through May, while the high mountains further north are still under snow. This is also when Madeira’s MIUT and mainland Portugal’s early-season races run.
Early summer: the mid-altitude window
By May–June, Croatia’s karst trails, Austria’s lower alpine routes, and mid-altitude Pyrenean and Dolomite races open up as snow clears at moderate elevation. This is a good window for races in the 100–120 km band that don’t cross the very highest passes.
Mid-to-late summer: peak high-mountain season
July–September is when the true high-mountain races run — UTMB and the Chamonix week, the Eiger Ultra Trail, Grand Raid des Pyrénées, Tor des Géants, Ehunmilak in the Basque mountains. This is also when the highest passes across the Alps and Pyrenees are most reliably clear of snow, though summer storms remain a real risk at altitude — check race-specific mandatory gear for cold-weather items even in August.
Early autumn: the second alpine window and the east
September brings a second wave of mountain racing (Ultra Pirineu, Swiss Peaks, Spartathlon in Greece) as summer heat eases, plus races in Poland’s Bieszczady and Beskid ranges, where the season runs a little later than the high Alps.
Late autumn: the season closes on the coast
By October–November, the mountains are closing for winter and the calendar shifts back to lower, coastal terrain — the Côte d’Azur, and a scattering of road-friendlier “hundred” races that don’t depend on high passes.
Winter: a niche, distinct window
A small number of races — the Arc of Attrition on the Cornish coast is the clearest example on our calendar — deliberately race through winter conditions as part of their identity, attracting a different kind of entrant than the summer alpine crowd.
Use the month dropdown on the calendar to see exactly what’s running in any given window, region by region.
Found on Ultra Radar Articles — part of our European ultra calendar.