The French Pyrenees stage the Cirque de Gavarnie's 1,500m amphitheatre wall, the Cathar castles of Montségur and Quéribus on impossible peaks, and Lourdes' Marian sanctuary drawing 6 million pilgrims yearly.
Cirque de Gavarnie at peak with the waterfall (Europe's tallest at 422m) at full flow, Pic du Midi observatory accessible, and high-altitude refuges fully open.
Cauterets, Saint-Lary, and Grand Tourmalet ski December-April, with the Tour de France's iconic Col du Tourmalet pass closed in winter snow.
Spring shoulder with high passes still snow-bound, but the Cathar castle circuit accessible and the Pyrenean foothills at peak wildflower bloom.
Pyrenean autumn through October, Cirque de Gavarnie waterfall still active before winter freeze, and Lourdes pilgrimage continuing through the cooler months.