From Ax-les-Thermes, the Col de Pailhères unwinds 15.3 km at an average 7.9% up to 2001 m, a long, steady climb through a Pyrenean landscape still largely untouched by cycling tourism.
A long, exposed climb
The road climbs with barely a flat stretch from the edge of Ax-les-Thermes, alternating wooded sections in the early kilometres with sweeping open hairpins above the treeline. The final kilometres, entirely exposed, leave riders at the mercy of wind and sun, with gradients hardening to 12% in places.
A pass that joined Tour de France legend late
The Col de Pailhères made its first Tour de France appearance only in 2003, when Lance Armstrong and Iban Mayo battled it out on its slopes, before returning in 2005, 2015 and in a 2021 time trial. Its relative newcomer status among the great Pyrenean passes contrasts with the severity of its profile, comparable to the neighbouring Tourmalet.
Getting the climb right
A lightweight windbreaker is useful for the descent and the frequent gusts near the summit, where vegetation disappears entirely. A compact cassette helps manage the steady effort on a climb that offers little respite over more than an hour.
When to go
June to September — the road can still hold snow in spring due to the altitude, and local authorities occasionally close the pass in early winter conditions.
Good to know
Ax-les-Thermes, the spa town at the foot of the pass, offers a wide choice of accommodation and lets riders recover in its warm baths after the effort, while the Mijanès side appeals to cyclists seeking quiet, unspoiled nature.
