Devils Thumb

Devils Thumb is a striking horn of rock rising from the Stikine Icecap on the Alaska–British Columbia border, near the coastal town of Petersburg. Its thumb-like summit and sheer faces make it a legendary and rarely climbed alpine objective.

The rock is granite and diorite, forming steep, ice-veneered walls above a heavily glaciated wilderness. The climbing is serious alpinism, mixing rock, snow, and ice on long, remote routes, with the notorious northwest face among the hardest big walls attempted in the region. Difficulty spans from demanding glacier and ridge ascents to extreme mixed climbing, all in a setting battered by coastal storms. The peak gained wider fame through mountaineering literature recounting a solo attempt on its flanks.

Practical detail: access is arduous, typically by bush plane or a long approach from the coast up crevassed glaciers, so ascents are full expeditions demanding self-sufficiency. There are no facilities anywhere near the peak, and the maritime weather brings frequent storms and heavy snowfall that can strand parties for weeks. The area straddles the international border in a vast icefield.

Season and character: the most settled window tends to be spring into early summer, roughly April to June, when colder temperatures stabilise the snow and storms are marginally less relentless, though good weather is never guaranteed on this stretch of coast. Devils Thumb represents alpine climbing at its most committing: a beautiful, forbidding spire in one of the wildest corners of North America, where the approach, the weather, and the isolation are as formidable as the technical climbing itself.