A Breton one-day race where positioning, weather, and late accelerations decide more than pure power.
Boucles de l'Aulne - Châteaulin is a men's one-day race held each May in Brittany, France. The race loops through the Aulne river valley around the town of Châteaulin, typically finishing with circuits that reward sharp positioning and tactical awareness.
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This is Breton racing at its most honest: narrow roads, changeable weather, and a finale that punishes hesitation. The race sits in the heart of Brittany's spring calendar, drawing a mix of continental teams and French squads who know the roads. It rarely produces a procession, and the closing circuits around Châteaulin tend to split things quickly once the attacks begin.
The course loops through the Aulne valley, typically returning to Châteaulin for finishing circuits that include short climbs, technical descents, and narrow stretches where positioning becomes critical. The race is not decided by a single climb, but by the accumulation of accelerations and the ability to stay near the front when the road narrows or the weather turns. Breakaways can survive if the peloton misjudges the gap, but the circuits favor riders who can respond to repeated attacks and handle technical finales under pressure. Wind, rain, and road surface all matter here, and the winner is usually someone who reads the final hour correctly and has the legs to follow when it matters.
The race loops around Chateaulin in Brittany on circuits that mix short climbs with technical descents through the Aulne valley.
The rolling Breton terrain rewards riders who can accelerate on short, sharp climbs and hold position through the final laps.
Most recent winner: Lewis Askey (2025)
Won in 2023 in what was one of his final professional victories, lending the race credibility from a rider who had won at the highest level.
